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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.
City Average (°F°C) Record (°F°C) Yearly (inchescm)
High Low High Low Precipitation Snow
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