Climate of Buenos Aires#Winter

File:El Nino regional impacts.png years, precipitation in Buenos Aires is higher, particularly during the summer months.]]

Buenos Aires is located in the humid subtropical climate zone (Köppen climate classification: Cfa).{{cite web |archive-url=https://web.archive.org/web/20140227015825/http://www.atlasdebuenosaires.gov.ar/aaba/index.php?option=com_content&task=view&id=26&Itemid=22 |archive-date=27 February 2014 |url=http://www.atlasdebuenosaires.gov.ar/aaba/index.php?option=com_content&task=view&id=26&Itemid=22 |title=Clima |publisher=Atlas Ambiental de Buenos Aires |language=es |access-date=24 December 2015}}{{cite journal |author1=Peel, M. C. |author2=Finlayson B. L. |author3=McMahon, T. A. |name-list-style=amp |year= 2007 |title= Updated world map of the Köppen−Geiger climate classification |journal= Hydrol. Earth Syst. Sci. |volume= 11 |issue=5 |pages = 1633–1644 |doi= 10.5194/hess-11-1633-2007 |url= http://www.hydrol-earth-syst-sci.net/11/1633/2007/hess-11-1633-2007.pdf |issn= 1027-5606 |bibcode= 2007HESS...11.1633P|doi-access= free }} Due to the maritime influences from the adjoining Atlantic Ocean,{{cite journal |last1=Pezza |first1=Alexandre |last2=Simmonds |first2=Ian |last3=Coelho |first3=Caio |year=2010 |title=The unusual Buenos Aires snowfall of July 2007 |journal=Atmospheric Science Letters |volume=11 |issue=4 |pages=249–254 |doi=10.1002/asl.283 |bibcode = 2010AtScL..11..249P |doi-access=free }} its climate is temperate with extreme temperatures (both hot and cold) being rare.{{cite web |url=http://www.turismo.buenosaires.gob.ar/es/article/clima |title=Clima |publisher=Official Tourism site of Buenos Aires |language=es |access-date=24 December 2015|date=2013-04-16 }} Thus, cold air coming directly from the south are moderated by the Atlantic Ocean and warmer than winds from the southwest (which are not moderated by it).{{cite journal |last1=Bejaran |first1=R. |last2=Camilloni |first2=I. |year=2003 |title=Objective method for classifying air masses: an application to the analysis of Buenos Aires' (Argentina) urban heat island intensity |url=https://www.researchgate.net/publication/225703325 |journal=Theoretical and Applied Climatology |volume=74 |issue=1–2 |pages=93–103 |doi=10.1007/s00704-002-0714-4 |access-date=12 March 2016|bibcode = 2003ThApC..74...93B |hdl=11336/147367 |s2cid=96475360 |hdl-access=free }}

The climate of Buenos Aires is dominated by the semi–permanent South Atlantic High throughout the year. This brings in moist winds from the northeast, which brings most of the precipitation to the city. During winter, it brings in frontal systems responsible for precipitation in the city. In autumn and summer, it produces thunderstorms that are generally located north of the city and produces strong winds from the south or southeast that can occasionally lead to the swelling of the Río de la Plata, flooding coastal areas. The South Pacific High is the origin of polar air masses that are responsible for the coldest temperatures and result in clear and very dry conditions. These air masses originate from the South Pacific high and move in a northeastern direction during winter towards Buenos Aires. Although it is polar maritime (this is a cool, moist air mass that forms from oceans located in the sub-Antarctic and Antarctic regions at the southern tip of South America), it becomes modified as it passes over the South American continent, becoming drier as it arrives at Buenos Aires.{{sfn|Blouet|2010|p=33}} This is because as the cold air masses from the South Pacific High move over the Pacific Ocean and the Andes and reach the land south of 35^oS (where the Andes not as high), anticyclogenesis leads to the formation of a strong high pressure system in the center of the country (at around 40^oS).{{cite journal |last1=Vera |first1=Carolina |last2=Vigliarolo |first2=Paula |last3=Berbery |first3=Ernesto |year=2002 |title=Cold Season Synoptic-Scale Waves over Subtropical South America |journal=Monthly Weather Review |volume=130 |issue=3 |pages=684–699 |doi=10.1175/1520-0493(2002)130<0684:CSSSWO>2.0.CO;2 |bibcode = 2002MWRv..130..684V |doi-access=free |hdl=11336/147368 |hdl-access=free }} This high pressure system brings cold and dry, polar continental air masses to Buenos Aires. Cold fronts are more common during winter than in summer as the South Atlantic and South Pacific highs are at their southernmost positions during summer, making it difficult for cold fronts to enter.{{cite journal |last1=Seluchi |first1=Marcelo |last2=Marengo |first2=José |year=2000 |title=Tropical-Midlatitude Exchange of Air Masses During Summer and Winter in South America: Climatic Aspects and Examples of Intense Events |journal=International Journal of Climatology |volume=20 |issue=10 |pages=1167–1190 |doi=10.1002/1097-0088(200008)20:10<1167::AID-JOC526>3.0.CO;2-T |bibcode=2000IJCli..20.1167S }}

The city is located in an area in which the Pampero and the Sudestada winds pass by.{{cite web |url=http://estatico.buenosaires.gov.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap2_pacc_ba3030.pdf |title=Capítulo 2: Impacto en la Ciudad de Buenos Aires |work=Plan de Acción Buenos Aires 2030 |publisher=Gobierno de la Ciudad de Buenos Aires |language=es |access-date=29 December 2015 |url-status=dead |archive-url=https://web.archive.org/web/20120310111736/http://estatico.buenosaires.gov.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap2_pacc_ba3030.pdf |archive-date=10 March 2012 |df=dmy-all }} Being located in the Pampas, the weather is variable due to the contrasting air masses and frontal storms.{{sfn|Blouet|2010|p=391}} The Pampero wind brings in cold, dry air from the south while warm humid tropical air produces sultry nortes (a gentle wind usually from the northeast formed by trade winds and the South Atlantic High that brings cloudy, hot, and humid weather and is responsible for bringing heat waves).{{sfn|Blouet|2010|p=391}}{{cite web |url= http://www3.smn.gob.ar/?mod=biblioteca&id=73 |title= Viento Pampero |publisher= Servicio Meteorológico Nacional |language= es |access-date= 2 January 2016 |archive-date= 1 January 2018 |archive-url= https://web.archive.org/web/20180101082154/http://www3.smn.gob.ar/?mod=biblioteca&id=73 |url-status= dead }}{{cite web |url= http://www.oni.escuelas.edu.ar/2008/CORDOBA/1324/trabajo/viento.html |title= Viento |publisher= Escuela Técnica IPEM 56 Abraham Juarez |language= es |access-date= 4 April 2016 |url-status= dead |archive-url= https://web.archive.org/web/20160502101718/http://www.oni.escuelas.edu.ar/2008/CORDOBA/1324/trabajo/viento.html |archive-date= 2 May 2016 |df= dmy-all }} Often, the passage of the Pampero winds occurs as a cold front passes through, leading to strong gusts from the south or southeast, a decrease in humidity and temperature, and an increase in the atmospheric pressure. When the cold Pampero winds meet with warm humid air from the north, thunderstorms are produced.{{sfn|Blouet|2010|p=391}} The Sudestada winds are formed when a high pressure system located in southern Argentina interacts with a low pressure system over Uruguay and southern Brazil.{{sfn|Isla|2009|p=57}} When Sudestadas form, they bring long periods of precipitation, cloudy weather and cooler temperatures.{{sfn|Fittkau|1969|p=73}}{{sfn|Veblen|2007|p=234}}{{cite web |url= http://www3.smn.gob.ar/?mod=biblioteca&id=71 |title= Sudestada | publisher = Servicio Meteorológico Nacional |language=es | access-date = 11 June 2015}} These are common during the winter months. Because the Sudestada brings the highest wind speeds (particularly when these winds are combined with the astronomical tides), the Sudestada is responsible for floods that occur in low-lying areas.{{cite web |last1=Barros |first1=Vicente |last2=Menéndez |first2=Angel |last3=Natenzon |first3=Claudia |last4=Kokot |first4=Roberto |last5=Codignotto |first5=Jorge |last6=Re |first6=Mariano |last7=Bronstein |first7=Pablo |last8=Camilloni |first8=Inés |year=2006 |url= http://www.start.org/Projects/AIACC_Project/working_papers/Working%20Papers/AIACC_WP26_Barros%20(rev)%201.pdf |title= Vulnerability to floods in the metropolitan region of Buenos Aires under future climate change |work=AIACC Working Paper No. 26 |publisher= Assessments of Impacts and Adaptations to Climate Change (AIACC) |access-date= 13 March 2016}} Its geomorphology along with inadequate drainage network and infrastructure, a flat landscape, and low elevations (much of Buenos Aires lies between {{convert|4|and|24|m|ft}} above sea level) makes Buenos Aires highly vulnerable to flooding, particularly during heavy rainfall.{{sfn|Kreimer|2000|p=28-29}}{{sfn|Kreimer|2000|p=32}}{{sfn|Kreimer|2000|p=36}} Flooding impacts the neighbourhoods La Boca and Barracas which are in the southern parts of the city, more low-lying and inhabited by poor people (of low socioeconomic status).{{sfn|Kreimer|2000|p=33}}

The urban heat island makes the city warmer than suburban and rural areas.{{cite web |url=http://www.buenosaires.gob.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap7_pacc_ba3030.pdf |title=Capítulo 7: Isla de calor urbana |work=Plan de Acción Buenos Aires 2030 |publisher=Gobierno de la Ciudad de Buenos Aires |language=es |access-date=14 February 2016}} On average, Buenos Aires is warmer than the surrounding areas by {{convert|1.5|to|3.5|C-change}} owing to the urban heat island. The average heat island is higher in summer than in winter.{{cite journal |last1=Figuerola |first1=Patricia |last2=Mazzeo |first2=Nicolás |year=1998 |title=Urban-Rural Temperature Differences in Buenos Aires|journal=International Journal of Climatology |volume=18 |issue=15 |pages=1709–1723 |doi=10.1002/(SICI)1097-0088(199812)18:15<1709::AID-JOC338>3.0.CO;2-I |bibcode = 1998IJCli..18.1709F }} This varies by season; its influence during the day is the stronger in July than in January. In contrast, the urban heat island effect during nights is more intense in January than in July.

The El Niño–Southern Oscillation is a major factor in the variation of annual precipitation within Buenos Aires and the Pampas, particularly during spring and summer.{{sfn|Araus|2015|p=47}}{{sfn|Krishna|2015|p=151}} During an El Niño year, precipitation is higher,{{sfn|Krishna|2015|p=151}} with a significant increase in precipitation from November to January.{{sfn|Araus|2015|p=48}} In contrast, La Niña years are associated with lower precipitation;{{sfn|Krishna|2015|p=151}} precipitation is below average during October–December.{{sfn|Araus|2015|p=48}}

File:Jacarandas at Plaza Miserere.jpg, Buenos Aires during Spring|Jacarandas in bloom at Plaza Miserere, Buenos Aires]]

Springs in Buenos Aires are typically mild during the day with cool to cold nights.{{cite web |url=http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/primavera.pdf |title=La Primavera en la Ciudad de Buenos Aires |publisher=Servicio Meteorológico Nacional |language=es |access-date=2 January 2016}} The average high is {{convert|22.8|C|1}} while the average low is {{convert|13.4|C|1}}. It is one of the rainiest seasons in the city, averaging {{convert|320.5|mm|in|abbr=on}} of precipitation and 28 days with measurable precipitation. Nonetheless, most precipitation events are short in duration.

Spring is characterized by changeable weather with temperatures that can fluctuate.{{cite web |url=http://www.britannica.com/place/Buenos-Aires |title=Buenos Aires |publisher=Encyclopædia Britannica |access-date=3 January 2016}} Cold polar air from the south can bring cooler temperatures. An extreme example of this was in November 2007, when cold polar air from the south brought temperatures down to {{convert|2.5|C|1}} on the morning of 15 November.{{cite web |url=http://www3.smn.gob.ar/serviciosclimaticos/?mod=clima&id=66 |title=Temperaturas Invernales en Pleno Noviembre |publisher=Servicio Meteorológico Nacional |language=es |access-date=3 January 2016}} The same polar air affected many parts of the country, bringing cold temperatures and snow in coastal parts of Patagonia. In contrast, hot humid air from the north produces sultry days;{{sfn|Blouet|2010|p=391}} the highest temperature recorded in spring is {{convert|36.8|C|1}} on 27 November 1955. In some cases, heat waves,{{refn|group=note|name=Heat Wave|According to the Argentine National Weather Service, a heat wave is defined when there are 3 consecutive days in where the minimum and maximum temperature exceed {{convert|22.0|C|1}} and {{convert|32.3|C|1}} respectively.}} can occur, particularly in November.{{cite web |url=http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/OlasdeCalor_BuenosAires.pdf |title=Resumen Estadístico y Cronológico de las Olas de Calor en la Ciudad de Buenos Aires |publisher=Servicio Meteorológico Nacional |language=es |access-date=3 January 2016}}

File:Plaza San Martín, Buenos Aires (27146002798).jpg. Thunderstorms are common during the summer.]]

Summers are hot and humid. On average, mornings and afternoons are hot whereas temperatures drop considerably at night. The average high is {{convert|29.3|C|1}} while the average low is {{convert|19.4|C|1}}.{{cite web |url=http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/verano.pdf |title=El Verano en la Ciudad de Buenos Aires |publisher=Servicio Meteorológico Nacional |language=es |access-date=3 January 2016}} With a mean precipitation of {{convert|386.5|mm|in|abbr=on}}, it is the rainiest season. This is due to high temperatures and high insolation that lead to the development of a low pressure system called the Chaco Low situated over northern Argentina that interacts with the South Atlantic High to generate a pressure gradient that brings moist easterly winds to the region, favouring precipitation, which mostly occurs in the form of convective thunderstorms.{{cite web |url= http://www.metoffice.gov.uk/media/pdf/1/l/Argentina.pdf |title= Climate Overview |publisher= Met Office |access-date= 7 June 2015}}{{sfn|Veblen|2007|p=233}} The Chaco Low also interacts with the South Atlantic high to bring warm and tropical air from the north which is the strongest in summer when the Chaco Low is at its strongest due to higher insolation.

Heat waves are a common feature of summers in the city. These heat waves place extra demand on electricity usage, leading to shortages.{{cite news|title=Analysis: Fernandez image wilts in year–end heat wave|work=Reuters|date=31 December 2013|first=Hugh|last=Bronstein|url=https://www.reuters.com/article/us-argentina-fernandez-analysis-idUSBRE9BU0AZ20131231|access-date=3 January 2016}}{{cite news|title=Buenos Aires residents protest over 'heatwave power cuts'|work=BBC|date=31 December 2013|url=https://www.bbc.co.uk/news/world-latin-america-25556136|access-date=3 January 2016}} In extreme cases, these power shortages during heat waves can cause traffic jams and protests, such as the ongoing 12-day March 2023 heat wave, the longest heat wave ever recorded in Buenos Aires{{cite web |url=https://twitter.com/SMN_Argentina/status/1634592282471964673|title=Por primera vez en su historia, CABA supera el umbral de temperatura máxima de ola de calor (32,3 °C) por 𝟭𝟮 𝗱𝗶́𝗮𝘀 𝗰𝗼𝗻𝘀𝗲𝗰𝘂𝘁𝗶𝘃𝗼𝘀.|publisher=Servicio Meteorológico Nacional, Twitter |language=es |access-date=11 March 2023}} However, most heat waves are less than a week long, and are followed by the passage of the cold, dry Pampero wind, which brings violent and intense thunderstorms with strong gusts and hail followed by cooler temperatures and lower humidity.{{sfn|Blouet|2010|p=391}}{{cite web |url=http://www.produccion-animal.com.ar/clima_y_ambientacion/88-Pampero.pdf |title=El Pampero, Un Viento del Sur Indómito y Mañero |language=es |access-date=10 January 2016}}{{cite journal |last1=Mezher |first1=Romina |last2=Doyle |first2=Moira |last3=Barros |first3=Vicentre |year=2012 |title=Climatology of hail in Argentina|url=https://www.researchgate.net/publication/257035709 |journal=Atmospheric Research |volume=114–115 |issue=1 |pages=70–82 |doi=10.1016/j.atmosres.2012.05.020 |access-date=19 September 2015|bibcode = 2012AtmRe.114...70M |hdl=11336/68858 |hdl-access=free }} Occasionally, a tornado can form, which can strike the city; most tornadoes are relatively weak and rarely cause deaths.{{cite web|url=http://www.msal.gob.ar/salud-y-desastres/index.php/riesgos-de-desastres-en-argentina/principales-amenazas/tormentas-y-tornados |language=es|title=Tornados y tormentas eléctricas|publisher=Ministerio de Salud|access-date=12 September 2015}} The greatest risk for tornadoes occurs in summer due to favourable conditions. These severe storms can damage cars, houses and disrupt public services such as transportation and collection and disposal of urban solid waste.{{cite web|url= https://www.gfdrr.org/sites/default/files/publication/Improving%20the%20Assessment%20of%20Disaster%20Risks%20to%20Strengthen%20Financial%20Resilience.pdf |title=Chapter 2: Assessment of Disaster Risk Management Strategies in Argentina |work=Improving the Assessment of Disaster Risks to Strengthen Financial Resilience |publisher= World Bank |access-date= 9 September 2015}}{{rp|39}}

At the beginning of autumn, temperatures are warm to hot in the afternoon while nights and mornings are mild.{{cite web|url= http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/otonio.pdf

|language=es |title= El Otoño en la Ciudad de Buenos Aires |publisher= Servicio Meteorológico Nacional |access-date= 3 January 2016}} Later on in the season, conditions are cooler featuring mild afternoons, and cold nights and mornings. The average high and low are {{convert|23.2|C|1}} and {{convert|14.3|C|1}} respectively while precipitation averages {{convert|343.8|mm|in|abbr=on}} during this season. Similar to spring, the season is characterized by changeable weather conditions with temperatures that can fluctuate; temperatures as high as {{convert|37.9|C|1}} and as low as {{convert|-4.0|C|1}} have been recorded. Periods of rainy weather occur although these are usually of short duration. Frosts rarely occur, though they can occur as early as May.{{cite web |url=http://www.agro.uba.ar/heladas/buenosaires_obs_0.htm |title=Heladas Meteorológicas: Buenos Aires OBS. |work=Heladas en la Argentina |publisher=Facultad de Agronomía – Universidad de Buenos Aires |language=es |access-date=29 December 2015}}

June to August are the winter months in Buenos Aires.{{cite web |url=http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/invierno.pdf |title=El Invierno en la Ciudad de Buenos Aires |publisher=Servicio Meteorológico Nacional |language=es |access-date=24 December 2015}} Winters are mild with mild temperatures during the day and cold nights. Highs during the season average {{convert|16.6|C|1}} while lows average {{convert|8.3|C|1}}. Lows rarely drop below freezing, with the average annual lowest temperature being {{convert|0|C|1}} at the central observatory. Cold waves can occur in these months in which periods of cold temperatures can persist for days.{{refn|group=note|name=Cold wave|According to the Argentine National Weather Service, a cold wave occurs when there are 3 consecutive days where both the minimum and maximum temperatures are less than {{convert|3.8|C|1}} and {{convert|12.6|C|1}} respectively{{cite web |url=http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/OlasdeFrio_BuenosAires.pdf |title=Resumen Estadístico y Cronologico de las Olas de Frio en La Ciudad de Buenos Aires|publisher=Servicio Meteorológico Nacional |language=es |access-date=9 December 2016}}}} These cold waves, particularly during severe winters lead to increases in energy demand, which can cause significant energy shortages. Snowfall occasionally occurs in the surrounding areas of the city but rarely within Buenos Aires proper; since the start of meteorological observations in 1906 at the central observatory, snowfall has only been observed thrice: June 1918, July 1928, and July 2007. This is due to the city center having higher temperatures than the surrounding areas owing to the urban heat island effect.

Most of the precipitation comes from frontal systems associated with cyclogenesis and strong southeasterly winds (Sudestada), which bring long periods of precipitation, cloudy weather and cooler temperatures.{{sfn|Fittkau|1969|p=73}}{{sfn|Veblen|2007|p=234}} Winters are cloudy while relative humidity is very high, often 90% or higher, making the weather dull, grey and cool.{{sfn|Lydolph|1985|p=334}} Occasionally, warm air masses from the north bring warmer temperatures. These warm air masses can bring sunny weather, particularly during the afternoon when they come from the north or northwest as a result of a trough located in central Argentina. On the other hand, warm air masses from Brazil bring humid conditions, featuring high humidity with high cloud cover that is typical of a warm front of a frontal system and typical of tropical maritime air. These warm air masses that are responsible for the high humidity and cloud cover are the warmest air masses, leading to the warmest temperatures. Nonetheless, these are short lived as the Chaco Low, which is responsible for bringing in warm and tropical air from the north is weaker in winter due to lower insolation, leading to the winds from the north being less intense and shorter lived.

Towards the end of winter in August, there are important changes in the atmospheric circulation.{{cite web | url = http://www3.smn.gob.ar/serviciosclimaticos/clima/archivo/Tormenta_SantaRosa.pdf | title = La Tormenta de Santa Rosa | publisher = Servicio Meteorológico Nacional |language=es | access-date = 2 January 2016}} Warm, humid air penetrates the city, higher solar radiation and frequent synoptic weather disturbances from the west occur during the end of the winter. As such, the end of winter is usually characterized by heavy storms with lightning.{{cite web|url=http://www.argentina.gov.ar/argentina/portal/paginas.dhtml?pagina=1483 |title=Geography and Climate of Argentina |publisher=Government of Argentina |access-date=28 August 2015 |url-status=dead |archive-url=https://web.archive.org/web/20101220215355/http://www.argentina.gov.ar/argentina/portal/paginas.dhtml?pagina=1483 |archive-date=20 December 2010 }} This is popularly known as the Santa Rosa Storm, around 30 August. Based on 111 years of weather observations (1906–2016) from the central observatory, 61 years (55% of the time) have seen stormy weather occurring on days close to 30 August, although not all of these have led to heavy precipitation.

According to the central observatory, which has one of the most reliable and oldest records in South America, the highest temperature in Buenos Aires, {{convert|43.3|C|1}}, was recorded on 29 January 1957 while the lowest temperature recorded is {{convert|-5.4|C|1}} on 9 July 1918.{{cite web |archive-url=https://web.archive.org/web/20180728170957/https://www.smn.gob.ar/noticias/112-a%C3%B1os-midiendo-el-tiempo-de-buenos-aires |archive-date=28 July 2018 |url=https://www.smn.gob.ar/noticias/112-años-midiendo-el-tiempo-de-buenos-aires |title=112 años midiendo el tiempo de Buenos Aires |publisher=Servicio Meteorológico Nacional |language=es |access-date=28 July 2018 |url-status=live }} The warmest year on record is 2023, with a mean annual temperature of {{convert|19.2|C|1}}.{{cite web |url=https://repositorio.smn.gob.ar/handle/20.500.12160/2740 |title=Informe preliminar clima arg 2024 Final |publisher=Servicio Meteorológico Nacional |language=es |access-date=12 November 2024}} On the other hand, 1911 was the coldest year, with a mean annual temperature of {{convert|15.4|C|1}}.{{cite web |url=http://www.buenosairesherald.com/article/205886/2015-is-the-hottest-year-on-record-for-ba-city |title=2015 is the hottest year on record for BA City |publisher=Buenos Aires Herald |access-date=6 March 2016}}

The year with the maximum precipitation was 1900, when the city received {{convert|2024|mm|in|abbr=on}} of precipitation.{{cite web |last1=Rocha |first1=Laura |url=http://www.lanacion.com.ar/1751236-la-huella-del-temido-cambio-climatico-2014-es-el-mas-lluvioso-en-113-anos-en-buenos-aires |title=La huella del temido cambio climático: 2014 es el más lluvioso en 113 años en Buenos Aires |publisher=La Nacion |language=es |access-date=7 March 2016|date=2014-12-11 }} On the other hand, 1916 has been the driest year, with a mean annual precipitation of {{convert|504|mm|in|abbr=on}}.{{cite web |url=http://meteo-climat-bzh.dyndns.org/mete632-1888-2006-19-tn-1-0-0.php |title=Précipitations Mensuelles à Buenos Aires (Argentine) |publisher=Météoclimat |language=fr |access-date=7 March 2016}} The highest precipitation for a single day was recorded on 27 February 1930, when {{convert|194.1|mm|in|abbr=on}} of precipitation fell.

{{Clear}}

{{Weather box

|location = Buenos Aires Central Observatory, located in Agronomía (1991–2020, extremes 1906–present)

|metric first = yes

|single line = yes

|collapsed =

|Jan record high C = 43.3

|Feb record high C = 38.7

|Mar record high C = 38.9

|Apr record high C = 36.0

|May record high C = 31.6

|Jun record high C = 28.5

|Jul record high C = 30.2

|Aug record high C = 34.4

|Sep record high C = 35.3

|Oct record high C = 36.3

|Nov record high C = 36.8

|Dec record high C = 40.5

|year record high C = 43.3

|Jan high C = 30.1

|Feb high C = 28.9

|Mar high C = 27.0

|Apr high C = 23.2

|May high C = 19.4

|Jun high C = 16.4

|Jul high C = 15.5

|Aug high C = 17.9

|Sep high C = 19.7

|Oct high C = 22.6

|Nov high C = 26.0

|Dec high C = 29.0

|year high C = 22.9

|Jan mean C = 24.9

|Feb mean C = 23.8

|Mar mean C = 22.0

|Apr mean C = 18.2

|May mean C = 14.8

|Jun mean C = 12.0

|Jul mean C = 11.0

|Aug mean C = 13.0

|Sep mean C = 14.9

|Oct mean C = 17.9

|Nov mean C = 20.9

|Dec mean C = 23.6

|year mean C = 18.1

|Jan low C = 20.2

|Feb low C = 19.4

|Mar low C = 17.7

|Apr low C = 14.1

|May low C = 11.1

|Jun low C = 8.4

|Jul low C = 7.5

|Aug low C = 8.9

|Sep low C = 10.6

|Oct low C = 13.4

|Nov low C = 16.1

|Dec low C = 18.5

|year low C = 13.8

|Jan record low C = 5.9

|Feb record low C = 4.2

|Mar record low C = 2.8

|Apr record low C = −2.3

|May record low C = −4.0

|Jun record low C = −5.3

|Jul record low C = −5.4

|Aug record low C = −4.0

|Sep record low C = −2.4

|Oct record low C = −2.0

|Nov record low C = 1.6

|Dec record low C = 3.7

|year record low C = −5.4

|precipitation colour = green

|Jan precipitation mm = 134.4

|Feb precipitation mm = 129.3

|Mar precipitation mm = 120.0

|Apr precipitation mm = 130.3

|May precipitation mm = 93.5

|Jun precipitation mm = 61.5

|Jul precipitation mm = 74.4

|Aug precipitation mm = 70.3

|Sep precipitation mm = 80.6

|Oct precipitation mm = 122.9

|Nov precipitation mm = 117.6

|Dec precipitation mm = 122.8

|year precipitation mm = 1257.6

|Jan precipitation days = 8.9

|Feb precipitation days = 8.0

|Mar precipitation days = 8.2

|Apr precipitation days = 8.9

|May precipitation days = 7.2

|Jun precipitation days = 7.3

|Jul precipitation days = 7.4

|Aug precipitation days = 7.0

|Sep precipitation days = 7.4

|Oct precipitation days = 10.2

|Nov precipitation days = 8.9

|Dec precipitation days = 8.9

|year precipitation days = 98.3

|Jan snow days = 0.0

|Feb snow days = 0.0

|Mar snow days = 0.0

|Apr snow days = 0.0

|May snow days = 0.0

|Jun snow days = 0.0

|Jul snow days = 0.1

|Aug snow days = 0.0

|Sep snow days = 0.0

|Oct snow days = 0.0

|Nov snow days = 0.0

|Dec snow days = 0.0

|year snow days = 0.1

|Jan humidity = 64.6

|Feb humidity = 69.1

|Mar humidity = 72.0

|Apr humidity = 75.6

|May humidity = 78.7

|Jun humidity = 78.2

|Jul humidity = 77.0

|Aug humidity = 72.6

|Sep humidity = 69.5

|Oct humidity = 69.4

|Nov humidity = 65.3

|Dec humidity = 62.8

|year humidity = 71.2

|Jan sun = 272.8

|Feb sun = 223.2

|Mar sun = 217.0

|Apr sun = 168.0

|May sun = 158.1

|Jun sun = 135.0

|Jul sun = 142.6

|Aug sun = 170.5

|Sep sun = 180.0

|Oct sun = 204.6

|Nov sun = 246.0

|Dec sun = 266.6

|year sun =

|Jand sun = 8.8

|Febd sun = 7.9

|Mard sun = 7.0

|Aprd sun = 5.6

|Mayd sun = 5.1

|Jund sun = 4.5

|Juld sun = 4.6

|Augd sun = 5.5

|Sepd sun = 6.0

|Octd sun = 6.6

|Novd sun = 8.2

|Decd sun = 8.6

|yeard sun = 6.5

|source 1 = Servicio Meteorológico Nacional

{{cite web

| url = http://www3.smn.gob.ar/serviciosclimaticos/?mod=elclima&id=5&var=capitalfederal

| title = Valores Medios de Temperature y Precipitación-Capital Federal: Buenos Aires

| publisher = Servicio Meteorológico Nacional

| language = es

| access-date = 29 March 2017}}{{cite web

| url = https://ssl.smn.gob.ar/dpd/observaciones/estadisticas_normales_9120.zip

| title = Estadísticas Climatológicas Normales – período 1991–2020

| publisher = Servicio Meteorológico Nacional

| language = es

| access-date = 9 April 2023}}{{cite web

| archive-url = https://web.archive.org/web/20230708235600/http://repositorio.smn.gob.ar/bitstream/handle/20.500.12160/2506/estad%C3%ADsticas_climatol%C3%B3gicas_normales_1991-2020.pdf?sequence=4&isAllowed=y

| archive-date = 8 July 2023

| url = http://repositorio.smn.gob.ar/handle/20.500.12160/2506

| title = Estadísticas Climatológicas Normales – período 1991–2020

| publisher = Servicio Meteorológico Nacional

| language = es

| access-date = 8 July 2023

| year = 2023}}

}}

{{Weather box

|location = Jorge Newbery Airfield, located in Palermo (1991–2020, extremes 1961–present)

|metric first = yes

|single line = yes

|collapsed = yes

|Jan record high C = 37.5

|Feb record high C = 37.4

|Mar record high C = 36.2

|Apr record high C = 32.5

|May record high C = 29.0

|Jun record high C = 26.9

|Jul record high C = 26.7

|Aug record high C = 32.0

|Sep record high C = 30.7

|Oct record high C = 34.6

|Nov record high C = 35.6

|Dec record high C = 39.6

|year record high C = 39.6

|Jan high C = 28.4

|Feb high C = 27.3

|Mar high C = 25.5

|Apr high C = 22.0

|May high C = 18.4

|Jun high C = 15.5

|Jul high C = 14.4

|Aug high C = 16.5

|Sep high C = 18.3

|Oct high C = 21.1

|Nov high C = 24.5

|Dec high C = 27.4

|year high C = 21.6

|Jan mean C = 24.5

|Feb mean C = 23.7

|Mar mean C = 22.0

|Apr mean C = 18.5

|May mean C = 15.2

|Jun mean C = 12.3

|Jul mean C = 11.3

|Aug mean C = 12.9

|Sep mean C = 14.7

|Oct mean C = 17.7

|Nov mean C = 20.6

|Dec mean C = 23.2

|year mean C = 18.0

|Jan low C = 20.8

|Feb low C = 20.2

|Mar low C = 18.8

|Apr low C = 15.3

|May low C = 12.3

|Jun low C = 9.4

|Jul low C = 8.4

|Aug low C = 9.7

|Sep low C = 11.5

|Oct low C = 14.3

|Nov low C = 16.8

|Dec low C = 19.2

|year low C = 14.7

|Jan record low C = 10.0

|Feb record low C = 8.3

|Mar record low C = 4.5

|Apr record low C = 3.6

|May record low C = 0.8

|Jun record low C = -4.8

|Jul record low C = -2.0

|Aug record low C = -0.9

|Sep record low C = 0.6

|Oct record low C = 2.4

|Nov record low C = 5.8

|Dec record low C = 7.0

|year record low C = -4.8

|precipitation colour = green

|Jan precipitation mm = 117.5

|Feb precipitation mm = 112.3

|Mar precipitation mm = 111.8

|Apr precipitation mm = 108.3

|May precipitation mm = 83.3

|Jun precipitation mm = 54.6

|Jul precipitation mm = 64.3

|Aug precipitation mm = 61.5

|Sep precipitation mm = 72.6

|Oct precipitation mm = 104.7

|Nov precipitation mm = 103.2

|Dec precipitation mm = 112.8

|year precipitation mm = 1106.9

|unit precipitation days = 0.1 mm

|Jan precipitation days = 7.9

|Feb precipitation days = 7.3

|Mar precipitation days = 7.2

|Apr precipitation days = 8.1

|May precipitation days = 6.3

|Jun precipitation days = 6.2

|Jul precipitation days = 6.6

|Aug precipitation days = 6.0

|Sep precipitation days = 6.6

|Oct precipitation days = 9.1

|Nov precipitation days = 8.1

|Dec precipitation days = 7.8

|year precipitation days = 87.2

|Jan snow days = 0.0

|Feb snow days = 0.0

|Mar snow days = 0.0

|Apr snow days = 0.0

|May snow days = 0.0

|Jun snow days = 0.0

|Jul snow days = 0.1

|Aug snow days = 0.0

|Sep snow days = 0.0

|Oct snow days = 0.0

|Nov snow days = 0.0

|Dec snow days = 0.0

|year snow days = 0.1

|Jan humidity = 64.6

|Feb humidity = 69.1

|Mar humidity = 72.0

|Apr humidity = 75.6

|May humidity = 78.7

|Jun humidity = 78.2

|Jul humidity = 77.0

|Aug humidity = 72.6

|Sep humidity = 69.5

|Oct humidity = 69.4

|Nov humidity = 65.3

|Dec humidity = 62.8

|year humidity = 71.2

|Jan sun = 285.2

|Feb sun = 243.0

|Mar sun = 235.6

|Apr sun = 192.0

|May sun = 173.6

|Jun sun = 150.0

|Jul sun = 155.0

|Aug sun = 182.9

|Sep sun = 198.0

|Oct sun = 220.1

|Nov sun = 261.0

|Dec sun = 288.3

|year sun =

|Jand sun = 9.2

|Febd sun = 8.6

|Mard sun = 7.6

|Aprd sun = 6.4

|Mayd sun = 5.6

|Jund sun = 5.0

|Juld sun = 5.0

|Augd sun = 5.9

|Sepd sun = 6.6

|Octd sun = 7.1

|Novd sun = 8.7

|Decd sun = 9.3

|yeard sun = 7.1

|source 1 = Servicio Meteorológico Nacional

}}

{{Weather box

|location = Buenos Aires Central Observatory (1961–1990)

|metric first = yes

|single line = yes

|collapsed = yes

|Jan high C = 29.9

|Feb high C = 28.6

|Mar high C = 26.3

|Apr high C = 22.8

|May high C = 19.3

|Jun high C = 15.7

|Jul high C = 15.4

|Aug high C = 17.1

|Sep high C = 19.3

|Oct high C = 22.1

|Nov high C = 25.2

|Dec high C = 28.2

|year high C = 22.5

|Jan mean C = 24.5

|Feb mean C = 23.4

|Mar mean C = 21.3

|Apr mean C = 17.6

|May mean C = 14.4

|Jun mean C = 11.2

|Jul mean C = 11.0

|Aug mean C = 12.3

|Sep mean C = 14.4

|Oct mean C = 17.2

|Nov mean C = 20.3

|Dec mean C = 23.0

|year mean C = 17.5

|Jan low C = 19.6

|Feb low C = 18.9

|Mar low C = 16.9

|Apr low C = 13.3

|May low C = 10.4

|Jun low C = 7.7

|Jul low C = 7.6

|Aug low C = 8.3

|Sep low C = 10.0

|Oct low C = 12.7

|Nov low C = 15.4

|Dec low C = 18.1

|year low C = 13.2

|precipitation colour = green

|Jan precipitation mm = 119.0

|Feb precipitation mm = 117.6

|Mar precipitation mm = 134.1

|Apr precipitation mm = 97.0

|May precipitation mm = 73.6

|Jun precipitation mm = 62.6

|Jul precipitation mm = 66.3

|Aug precipitation mm = 69.8

|Sep precipitation mm = 73.3

|Oct precipitation mm = 119.0

|Nov precipitation mm = 108.6

|Dec precipitation mm = 105.0

|year precipitation mm = 1145.9

|Jan humidity = 64

|Feb humidity = 68

|Mar humidity = 72

|Apr humidity = 76

|May humidity = 77

|Jun humidity = 79

|Jul humidity = 79

|Aug humidity = 74

|Sep humidity = 70

|Oct humidity = 69

|Nov humidity = 66

|Dec humidity = 63

|year humidity = 71

|unit precipitation days = 0.1 mm

|Jan precipitation days = 9

|Feb precipitation days = 8

|Mar precipitation days = 9

|Apr precipitation days = 8

|May precipitation days = 8

|Jun precipitation days = 7

|Jul precipitation days = 8

|Aug precipitation days = 8

|Sep precipitation days = 7

|Oct precipitation days = 10

|Nov precipitation days = 9

|Dec precipitation days = 9

|year precipitation days =

|Jan sun = 279.0

|Feb sun = 240.8

|Mar sun = 229.0

|Apr sun = 220.0

|May sun = 173.6

|Jun sun = 132.0

|Jul sun = 142.6

|Aug sun = 173.6

|Sep sun = 189.0

|Oct sun = 227.0

|Nov sun = 252.0

|Dec sun = 266.6

|year sun = 2525.2

|source 1 = NOAA

{{Cite FTP | url = ftp://ftp.atdd.noaa.gov/pub/GCOS/WMO-Normals/TABLES/REGIII/AG/87585.TXT

| server = National Oceanic and Atmospheric Administration

| title = Buenos Aires Climate Normals 1961–1990

| access-date = 29 March 2017}}

|source 2 = Servicio Meteorológico Nacional (precipitation days),

{{cite web

| url = http://www3.smn.gob.ar/serviciosclimaticos/?mod=elclima&id=5&var=capitalfederal

| title = Valores Medios de Temperature y Precipitación-Capital Federal: Buenos Aires

| publisher = Servicio Meteorológico Nacional

| language = es

| access-date = 29 March 2017}} Deutscher Wetterdienst (sun){{cite web

| url = ftp://ftp-cdc.dwd.de/pub/CDC/observations_global/CLIMAT/multi_annual/sunshine_duration/1961_1990.txt

| title = Station 87585 Buenos Aires Observatorio

| work = Global station data 1961–1990—Sunshine Duration

| publisher = Deutscher Wetterdienst

| archive-url = https://web.archive.org/web/20171017195327/ftp://ftp-cdc.dwd.de/pub/CDC/observations_global/CLIMAT/multi_annual/sunshine_duration/1961_1990.txt

| archive-date = 2017-10-17

| url-status = dead

| access-date = 12 January 2016

}}{{refn|group=note|name=DWD|[https://web.archive.org/web/20171017195318/ftp://ftp-cdc.dwd.de/pub/CDC/help/stations_list_CLIMAT_data.txt The World Meteorological Organization Station ID for Buenos Aires Observatorio is 87585] Use this station ID to locate the sunshine duration}}

}}

{{Weather box

|location = Jorge Newbery Airfield (1961–1990)

|metric first = yes

|single line = yes

|collapsed = yes

|Jan high C = 28.6

|Feb high C = 27.4

|Mar high C = 25.3

|Apr high C = 21.8

|May high C = 18.3

|Jun high C = 15.0

|Jul high C = 14.5

|Aug high C = 15.9

|Sep high C = 17.9

|Oct high C = 20.9

|Nov high C = 24.2

|Dec high C = 27.1

|year high C = 21.4

|Jan mean C = 24.3

|Feb mean C = 23.3

|Mar mean C = 21.4

|Apr mean C = 17.9

|May mean C = 14.7

|Jun mean C = 11.4

|Jul mean C = 11.1

|Aug mean C = 12.2

|Sep mean C = 14.1

|Oct mean C = 17.1

|Nov mean C = 20.1

|Dec mean C = 22.8

|year mean C = 17.5

|Jan low C = 20.3

|Feb low C = 19.7

|Mar low C = 17.9

|Apr low C = 14.6

|May low C = 11.5

|Jun low C = 8.4

|Jul low C = 8.2

|Aug low C = 9.1

|Sep low C = 10.7

|Oct low C = 13.4

|Nov low C = 16.2

|Dec low C = 18.8

|year low C = 14.1

|precipitation colour = green

|Jan precipitation mm = 98.4

|Feb precipitation mm = 107.6

|Mar precipitation mm = 125.4

|Apr precipitation mm = 88.6

|May precipitation mm = 71.1

|Jun precipitation mm = 55.5

|Jul precipitation mm = 62.0

|Aug precipitation mm = 66.7

|Sep precipitation mm = 65.8

|Oct precipitation mm = 110.5

|Nov precipitation mm = 104.8

|Dec precipitation mm = 96.6

|year precipitation mm = 1053.0

|Jan humidity = 68

|Feb humidity = 71

|Mar humidity = 73

|Apr humidity = 75

|May humidity = 77

|Jun humidity = 78

|Jul humidity = 80

|Aug humidity = 75

|Sep humidity = 73

|Oct humidity = 72

|Nov humidity = 69

|Dec humidity = 67

|year humidity = 73

|unit precipitation days = 0.1 mm

|Jan precipitation days = 8

|Feb precipitation days = 8

|Mar precipitation days = 8

|Apr precipitation days = 7

|May precipitation days = 7

|Jun precipitation days = 7

|Jul precipitation days = 7

|Aug precipitation days = 7

|Sep precipitation days = 7

|Oct precipitation days = 10

|Nov precipitation days = 9

|Dec precipitation days = 9

|year precipitation days = 94

|Jan sun = 251.1

|Feb sun = 238.0

|Mar sun = 226.3

|Apr sun = 192.0

|May sun = 161.2

|Jun sun = 123.0

|Jul sun = 133.3

|Aug sun = 170.5

|Sep sun = 189.0

|Oct sun = 217.0

|Nov sun = 231.0

|Dec sun = 241.8

|year sun = 2374.2

|Jan percentsun = 56

|Feb percentsun = 63

|Mar percentsun = 60

|Apr percentsun = 57

|May percentsun = 50

|Jun percentsun = 42

|Jul percentsun = 43

|Aug percentsun = 50

|Sep percentsun = 52

|Oct percentsun = 54

|Nov percentsun = 55

|Dec percentsun = 54

|year percentsun = 53

|source 1 = NOAA

{{Cite FTP | url = ftp://ftp.atdd.noaa.gov/pub/GCOS/WMO-Normals/TABLES/REGIII/AG/87582.TXT

| server = National Oceanic and Atmospheric Administration

| title = Aeroparque B. Aires Aero Climate Normals 1961–1990

| access-date = 3 January 2016}}

|source 2 = Servicio Meteorológico Nacional (precipitation days 1961–1990)

}}

{{portal|Argentina}}

• Climate of Argentina
• Climatic regions of Argentina
• Pampas

{{reflist|group=note}}

{{Reflist|30em}}

{{refbegin|30em}}

• {{cite book |last1=Araus |first1=José |last2=Slafer |first2=Gustavo |title=Crop Stress Management and Global Climate Change |url=https://books.google.com/books?id=EDCeol8LODcC&pg=PA47 |publisher= CAB International |year=2015 |isbn=978-1-84593-680-8 |ref={{sfnRef|Araus|2015}}}}
• {{cite book |last1=Blouet |first1=Brian |last2=Blouet |first2=Olwyn |title=Latin America and the Caribbean: A Systematic and Regional Survey |chapter-url=https://books.google.com/books?id=f7MJvhxmr4kC&pg=PA391 |publisher= John Wiley & Sons |year=2010 |pages=385–415 |chapter=Chapter 13: Argentina, Uruguay, and Paraguay |isbn=978-0-470-38773-3 |ref={{sfnRef|Blouet|2010}}}}
• {{cite book |last1=Fittkau |first1=E. |last2=Illies |first2=J. |last3=Klinge |first3=H. |last4=Schwabe |first4=G. |title=Biogeography and Ecology in South America |url=https://books.google.com/books?id=H0LwCAAAQBAJ&pg=PA72 |publisher= Springer |year=1969 |isbn=978-94-011-9731-1 |ref={{sfnRef|Fittkau|1969}}}}
• {{cite book |last1=Isla |first1=Federico |last2=Enrique |first2=Schnack |editor-last=Latrubesse |editor-first=Edgardo |chapter-url=https://sudartomas.files.wordpress.com/2012/11/developmentsinearthsurfaceprocesses_vol13_specialvolumesofgeomorphology_naturalhazardsandhumanexacerbateddisastersinlatinamerica.pdf |title=Developments in Earth Surface Processes: Natural Hazards and Human–Exacerbated Disasters in Latin America |publisher=Elsevier |year=2009 |pages=333–349 |chapter=Chapter 3: The Changing Coastlines of South America |isbn=978-0-444-53117-9 |doi=10.1016/S0928-2025(08)10003-7 |ref={{sfnRef|Isla|2009}}}}
• {{cite book |last1=Kreimer |first1=Alcira |last2=Arnold |first2=Margaret |title=Managing Disaster Risk in Emerging Economies |series=Disaster Risk Management Series No. 2 |url=http://www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/2000/08/19/000094946_00080705302023/Rendered/PDF/multi_page.pdf |location=Washington D.C |publisher= World Bank |year=2000 |isbn=978-0-8213-4726-3 |ref={{sfnRef|Kreimer|2000}}}}
• {{cite book |last=Krishna |first=K. |title=Agricultural Prairies: Natural Resources and Crop Productivity |url=https://books.google.com/books?id=MZa9BwAAQBAJ&pg=PA151 |publisher= CRC Press |year=2015 |isbn=978-1-4822-5806-6 }}
• {{cite book |last1=Lydolph |first1=Paul |url=https://books.google.com/books?id=bBjIuXHEgZ4C&pg=PA334 |title=The Climate of the Earth |publisher=Rowman & Littlefield Publishers, Inc. |year=1985 |isbn=978-0-86598-119-5 }}
• {{cite book |editor-last1=Veblen |editor-first1=Thomas |editor-link1=Thomas T. Veblen |editor-last2=Young |editor-first2=Kenneth |editor-last3=Orme |editor-first3=Antony |title=The Physical Geography of South America |url=https://books.google.com/books?id=0Q-MY4-nlwwC&pg=PA234 |publisher= Oxford University Press |year=2007 |isbn=978-0-19-531341-3 |ref={{sfnRef|Veblen|2007}}}}

{{refend}}

• [http://www.smn.gob.ar/ Servicio Meteorológico Nacional] {{in lang|es}}
• [http://www3.smn.gob.ar/serviciosclimaticos/?mod=elclima&id=10 Climatic Characteristics of Buenos Aires] {{in lang|es}}

{{Buenos Aires}}

{{DEFAULTSORT:Climate of Buenos Aires}}

Category:Buenos Aires

Buenos Aires

Buenos Aires