Average August Temperatures for Iowa

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.

Average Temperatures for Iowa in August

Eastern Iowa

Central Iowa

Western Iowa

Reference

More Iowa Weather Information