Iowa Weather Records
Weather data and records for the U.S. state of Iowa based on data compiled by the NOAA.
All data displayed in U.S. customary units.
All data displayed in metric units.
Iowa Statewide Averages
Average temperatures over the entire territory of the state, from 1991–2020.
| Month |
High (°F°C) |
Low (°F°C) |
| January |
28.1-2.2 |
10.9-11.7 |
| February |
33.10.6 |
15.1-9.4 |
| March |
46.38.0 |
26.5-3.1 |
| April |
60.115.6 |
37.22.9 |
| May |
71.121.7 |
48.89.3 |
| June |
80.627.0 |
59.215.1 |
| July |
83.928.8 |
62.917.2 |
| August |
81.727.6 |
60.315.7 |
| September |
75.424.1 |
51.911.1 |
| October |
62.316.8 |
39.64.2 |
| November |
46.48.0 |
27.4-2.6 |
| December |
33.20.7 |
16.7-8.5 |
| Entire Year |
58.614.8 |
38.23.4 |
Iowa Cities
Yearly weather averages for various places in Iowa, from 1991–2020.
| Average (°F°C) |
Record (°F°C) |
Yearly (inchescm) |
| Burlington |
61.916.6 |
42.86.0 |
111.043.9 |
-27.0-32.8 |
37.495.0 |
n/a |
| Carroll |
59.015.0 |
37.63.1 |
111.944.4 |
-40.0-40.0 |
33.384.6 |
29.875.8 |
| Cedar Rapids |
58.614.8 |
38.63.7 |
109.943.3 |
-29.7-34.3 |
35.790.6 |
n/a |
| Des Moines |
60.816.0 |
41.85.5 |
108.042.2 |
-26.0-32.2 |
36.692.9 |
36.893.4 |
| Dubuque |
56.613.7 |
38.33.5 |
100.938.3 |
-30.8-34.9 |
38.297.0 |
42.6108.2 |
| Fort Madison |
61.716.5 |
44.26.8 |
107.141.7 |
-23.1-30.6 |
39.199.3 |
20.752.6 |
| Iowa City |
60.515.8 |
40.34.6 |
109.042.8 |
-32.1-35.6 |
34.888.4 |
n/a |
| Iowa Falls |
57.314.1 |
36.52.5 |
111.043.9 |
-34.1-36.7 |
38.196.8 |
29.474.7 |
| Lamoni |
61.416.3 |
41.25.1 |
113.045.0 |
-29.0-33.9 |
40.3102.4 |
28.271.5 |
| Mason City |
56.313.5 |
35.62.0 |
107.141.7 |
-35.0-37.2 |
36.291.9 |
44.6113.2 |
| Ottumwa |
60.816.0 |
41.15.0 |
115.046.1 |
-36.0-37.8 |
36.993.7 |
n/a |
| Rockwell City |
57.614.2 |
36.82.7 |
109.943.3 |
-35.0-37.2 |
32.081.3 |
30.878.1 |
| Sac City |
57.614.2 |
36.42.4 |
114.145.6 |
-35.0-37.2 |
32.983.5 |
30.577.5 |
| Sioux City |
60.215.7 |
37.83.2 |
108.042.2 |
-27.8-33.2 |
29.374.3 |
36.191.6 |
| Spirit Lake |
56.013.4 |
37.63.1 |
109.042.8 |
-38.9-39.4 |
28.773.0 |
41.4105.2 |
| Waterloo |
58.314.6 |
37.53.1 |
111.944.4 |
-34.1-36.7 |
36.392.1 |
39.199.4 |
| Webster City |
58.214.6 |
36.22.3 |
109.042.8 |
-34.1-36.7 |
36.893.5 |
33.484.9 |