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Iowa Weather And Climate

Iowa Weather means cold winters and hot humid summers. Areas on the Mississippi River are a little more moderate than those that are not on the river. There's plenty of snow in the winter, and storms caused by humidity in the spring and summer. Thunderstorms are often severe. Tornados aren't rare, although Iowa isn't the most active state for tornados.

Typical High and Low Temperatures For Various Iowa Cities

CityJanFebMarAprMayJunJulAugSepOctNovDec
Des Moines 29/12 35/18 48/29 61/40 72/51 82/61 86/66 84/64 76/54 64/42 47/29 33/17
Dubuque 25/9 31/15 43/26 57/38 69/49 79/58 82/62 80/60 72/52 60/40 44/28 30/15
Sioux City 29/8 35/15 47/26 62/37 73/49 82/58 86/63 84/61 76/50 64/38 45/25 32/13
Waterloo 26/6 32/13 45/25 60/36 72/48 82/58 85/62 83/60 75/50 62/38 45/25 31/12