:. 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

City Des Moines Dubuque Sioux City Waterloo
Jan 29/12 25/9 29/8 26/6
Feb 35/18 31/15 35/15 32/13
Mar 48/29 43/26 47/26 45/25
Apr 61/40 57/38 62/37 60/36
May 72/51 69/49 73/49 72/48
Jun 82/61 79/58 82/58 82/58
Jul 86/66 82/62 86/63 85/62
Aug 84/64 80/60 84/61 83/60
Sep 76/54 72/52 76/50 75/50
Oct 64/42 60/40 64/386 62/38
Nov 47/29 44/28 45/25 45/25
Dec 33/17 30/15 32/13 31/12