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Iowa

Climate

Iowa lies in the humid continental zone and generally has hot summers, cold winters, and wet springs.

Temperatures vary widely during the year, with an annual average of 49°F (9°C). The state averages 166 days of full sunshine and 199 cloudy or partly cloudy days. Des Moines, in the central part of the state, has a normal daily maximum temperature of 86°F (30°C) in July and a normal daily minimum of 10°F (–4°C) in January. The record low temperature for the state is –47°F (–44°C), established at Washta on 12 January 1912 and recorded again on Elkader on 3 February 1996; the record high is 118°F (48°C), registered at Keokuk on 20 July 1934. Annual precipitation averaged 34.7 in (88 cm) at Des Moines (1971–2000); statewide, snowfall averages 30 in (76 cm) annually and relative humidity averages 72%.