Average Temperatures in Iowa

Average Annual Temperatures in Iowa

Average annual temperatures for 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 yearly temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Eastern Iowa

Average annual temperatures
High °F	Low °F	Place	High °C	Low °C
61	41	Burlington	16	5
61	39	Cedar Rapids	16	4
60	41	Clinton	15	5
56	34	Cresco	13	1
60	40	Davenport	15	5
59	38	Decorah	15	3
58	39	Dubuque	14	4
60	38	Iowa City	15	3
62	43	Keokuk	16	6
59	39	Waterloo	15	4

Central Iowa

Average temperatures for the year
High °F	Low °F	Place	High °C	Low °C
60	39	Ames	15	4
61	41	Des Moines	16	5
57	36	Fort Dodge	14	2
58	37	Marshalltown	15	3
56	35	Mason City	13	2
61	40	Ottumwa	16	5
61	40	Rathbun Lake Dam	16	5

Western Iowa

Average yearly temperatures
High °F	Low °F	Place	High °C	Low °C
59	38	Carroll	15	3
57	36	Lake Park	14	2
56	36	Milford	13	2
61	36	Onawa	16	2
63	41	Shenandoah	17	5
60	37	Sioux City	15	3
55	36	Spirit Lake	13	2
57	38	Storm Lake	14	3

Reference

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

Average Annual Temperatures in Iowa

Eastern Iowa

Central Iowa

Western Iowa

Reference

More Iowa Weather Information