Average Annual Temperatures in Iowa

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Average annual temperatures for cities, towns and lakes throughout Iowa are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum yearly temperatures based on weather data collected from 1981 to 2010.

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

Eastern Iowa

Average annual temperatures
High °F Low °F Place High °C Low °C
63 43 Burlington 17 6
61 40 Cedar Rapids 16 5
61 41 Clinton 16 5
55 33 Cresco 13 1
59 39 Davenport 15 4
58 36 Decorah 15 2
58 40 Dubuque 15 4
62 41 Iowa City 17 5
62 43 Keokuk 17 6
58 37 Waterloo 15 3

Central Iowa

Average temperatures for the year
High °F Low °F Place High °C Low °C
60 39 Ames 15 4
60 42 Des Moines 16 5
58 37 Fort Dodge 14 3
58 37 Marshalltown 15 3
56 35 Mason City 13 2
61 40 Ottumwa 16 4
61 41 Rathbun Lake Dam 16 5

Western Iowa

Average yearly temperatures
High °F Low °F Place High °C Low °C
59 37 Carroll 15 3
58 36 Lake Park 14 2
56 34 Milford 14 1
61 36 Onawa 16 2
63 40 Shenandoah 17 5
60 37 Sioux City 16 3
57 37 Storm Lake 14 3
Reference

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

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