Average Temperatures for Iowa in July

Average temperatures for July at cities, towns and other locations around Iowa are listed below in degrees Fahrenheit and Celsius.

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

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Eastern Iowa

Average July temperatures
High °F Low °F Place High °C Low °C
85 66 Burlington 29 19
86 63 Cedar Rapids 30 17
84 65 Clinton 29 18
83 60 Cresco 28 16
84 64 Davenport 29 18
84 63 Decorah 29 17
85 64 Dubuque 29 18
84 63 Iowa City 29 17
86 67 Keokuk 30 19
85 64 Waterloo 29 18

Central Iowa

Average daily temperatures in July
High °F Low °F Place High °C Low °C
84 64 Ames 29 18
86 66 Des Moines 30 19
83 62 Fort Dodge 28 17
84 63 Marshalltown 29 17
83 61 Mason City 28 16
86 65 Ottumwa 30 18
85 66 Rathbun Lake Dam 29 19

Western Iowa

July temperatures: daily averages
High °F Low °F Place High °C Low °C
84 64 Carroll 29 18
85 63 Lake Park 30 17
83 62 Milford 28 17
86 63 Onawa 30 17
87 67 Shenandoah 31 19
85 63 Sioux City 29 17
83 63 Spirit Lake 28 17
82 64 Storm Lake 28 18
Reference

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

Iowa Temperatures
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