Average Precipitation for Iowa in October

The tables below give monthly averages for rainfall plus snowfall during October at cities, communities and other locations around Iowa.

Each place has a total for the amount of precipitation it usually receives this month. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The precipitation totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each region of the state: Eastern, Central and Western Iowa.

Eastern Iowa

Average monthly precipitation in October
Days Place Inches Milli­metres
9 Burlington 3.3 83
10 Cedar Rapids 3.0 76
9 Clinton 2.6 67
9 Cresco 2.9 73
10 Davenport 2.7 69
9 Decorah 2.7 68
9 Dubuque 3.1 78
9 Iowa City 3.0 76
9 Keokuk 3.3 84
9 Waterloo 2.8 70

Central Iowa

October averages for total rainfall plus snowfall
Days Place Inches Milli­metres
9 Ames 2.6 67
9 Des Moines 2.8 71
8 Fort Dodge 2.6 65
9 Marshalltown 2.7 68
9 Mason City 2.5 64
9 Ottumwa 2.8 71

Western Iowa

Average amount of rain and snow in October
Days Place Inches Milli­metres
9 Carroll 2.7 68
7 Lake Park 2.4 61
6 Milford 2.2 56
5 Onawa 2.3 59
8 Shenandoah 2.8 72
8 Sioux City 2.2 56
7 Spirit Lake 2.1 53
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Iowa Precipitation
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