Average Rainfall for Iowa in July





The tables below give monthly averages for rainfall during July at cities, towns and lakes in Iowa.

Each place has a total for the amount of precipitation it usually receives this month. Most sites also have information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The rainfall totals are averages based on weather data collected from 1981 to 2010 for the NOAA National Climatic Data Center.

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

Eastern Iowa

Average monthly precipitation in July
Days Place Inches Milli­metres
10 Burlington 4.3 108
10 Cedar Rapids 4.6 117
10 Clinton 3.8 96
10 Cresco 4.6 116
Davenport 4.2 107
10 Decorah 4.3 108
9 Dubuque 4.8 121
9 Iowa City 4.6 116
9 Keokuk 4.3 108
10 Waterloo 4.9 125

Central Iowa

July averages for total rainfall
Days Place Inches Milli­metres
9 Ames 4.8 123
10 Des Moines 4.5 114
10 Fort Dodge 4.7 119
10 Marshalltown 5.0 127
10 Mason City 4.7 119
10 Ottumwa 4.5 114
11 Rathbun Lake Dam 5.6 141

Western Iowa

Average amount of rain in July
Days Place Inches Milli­metres
10 Carroll 5.0 127
9 Lake Park 3.8 96
9 Milford 3.7 94
8 Onawa 4.0 101
10 Shenandoah 4.6 118
10 Sioux City 3.4 87
9 Storm Lake 4.4 112
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

Iowa Precipitation
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