Average Temperatures for Iowa in September





Average temperatures for September at cities, towns and lakes throughout 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 1981 to 2010 by the US National Climatic Data Center.

Eastern Iowa

Average September temperatures
High °F Low °F Place High °C Low °C
79 56 Burlington 26 14
77 54 Cedar Rapids 25 12
76 54 Clinton 25 12
72 47 Cresco 22 8
75 52 Davenport 24 11
75 50 Decorah 24 10
74 54 Dubuque 24 12
78 54 Iowa City 26 12
78 56 Keokuk 25 13
75 51 Waterloo 24 10

Central Iowa

Average daily temperatures in September
High °F Low °F Place High °C Low °C
77 53 Ames 25 12
76 55 Des Moines 25 13
75 51 Fort Dodge 24 10
75 50 Marshalltown 24 10
73 49 Mason City 23 9
76 53 Ottumwa 24 12
76 54 Rathbun Lake Dam 24 12

Western Iowa

September temperatures: daily averages
High °F Low °F Place High °C Low °C
75 51 Carroll 24 10
75 51 Lake Park 24 10
73 48 Milford 23 9
78 50 Onawa 25 10
79 54 Shenandoah 26 12
76 51 Sioux City 25 10
74 52 Storm Lake 23 11
Reference

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

Iowa Temperatures
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