Average Temperatures for Iowa in August





Average temperatures for August 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 August temperatures
High °F Low °F Place High °C Low °C
83 64 Burlington 29 18
83 61 Cedar Rapids 29 16
82 63 Clinton 28 17
81 57 Cresco 27 14
82 62 Davenport 28 16
83 61 Decorah 28 16
82 62 Dubuque 28 17
82 60 Iowa City 28 16
84 65 Keokuk 29 18
83 61 Waterloo 28 16

Central Iowa

Average daily temperatures in August
High °F Low °F Place High °C Low °C
82 62 Ames 28 17
84 64 Des Moines 29 18
80 60 Fort Dodge 27 15
82 60 Marshalltown 28 15
80 58 Mason City 27 14
84 62 Ottumwa 29 17
84 64 Rathbun Lake Dam 29 18

Western Iowa

August temperatures: daily averages
High °F Low °F Place High °C Low °C
82 61 Carroll 28 16
83 60 Lake Park 28 16
80 60 Milford 27 16
84 59 Onawa 29 15
85 64 Shenandoah 30 18
83 61 Sioux City 28 16
80 60 Spirit Lake 27 16
80 61 Storm Lake 27 16
Reference

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

Iowa Temperatures
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