Iowa September Weather

Iowa weather averages and all-time records in the month of September from 1991–2020 based on data made available by the NOAA.
State:
Month:
Statewide September Averages
High temperature 75.4 °F
Low temperature 51.9 °F
Precipitation 3.5 inches
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Iowa Cities
September weather averages for various places in Iowa, from 1991–2020.
City Average (°F) Record (°F) Monthly (inches)
High Low High Low Precipitation
Ames 76.2 51.6 102 22 3.4
Burlington 78.0 55.9 103 23 3.5
Carroll 76.3 51.4 103 19 2.9
Cedar Rapids 77.0 53.9 105 22 4.0
Davenport 77.4 54.2 100 30 3.3
Des Moines 77.1 55.8 103 23 3.2
Dubuque 73.0 52.0 97 28 3.8
Fort Madison 77.6 58.0 100 31 3.5
Iowa City 77.1 54.3 101 20 3.3
Iowa Falls 74.9 50.5 101 19 3.5
Lamoni 77.5 55.0 103 24 3.7
Mason City 74.3 49.1 103 15 3.4
Northwood 71.4 48.7 98 20 3.4
Ottumwa 76.6 54.0 107 23 3.5
Rockwell City 75.0 51.6 102 20 2.9
Sac City 75.1 50.2 103 21 2.9
Sioux City 77.2 51.4 103 25 2.8
Spirit Lake 74.2 53.6 101 21 3.3
Waterloo 75.7 51.1 102 19 3.1
Webster City 75.6 49.9 103 20 3.3