Rudolf Geiger

{{short description|Germanische meteorologist and climatologist (1894–1981)}}

{{Infobox scientist

|name = Rudolf Geiger

|image =

|image_size =150px

|caption = Rudolf Geiger

|birth_name = Rudolf Oskar Robert Williams Geiger

|birth_date = 24 August 1894

|birth_place = Erlangen, German Empire

|death_date = {{death date and age|1981|1|22|1894|8|24|df=y}}

|death_place = Munich, West Germany

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|nationality = German

|field = Meteorology

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|known_for = Köppen–Geiger climate classification

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}}

Rudolf Oskar Robert Williams Geiger ({{IPAc-en|ˈ|ɡ|aɪ|ɡ|ər}}; {{IPA|de|ˈɡaɪɡɐ|lang}}; 24 August 1894 – 22 January 1981) was a German meteorologist and climatologist. He was the son of Indologist Wilhelm Geiger and the brother of physicist Hans Geiger. He worked with Wladimir Köppen on climatology, hence the Köppen–Geiger climate classification.{{Cite web |date=2022-03-17 |title=Rudolf Oskar Robert Williams Geiger, German meteorologist |url=https://www.britannica.com/biography/Rudolf-Oskar-Robert-Williams-Geiger |access-date=2022-03-23 |website=Britannica |language=en}}