Clinton Iowa Climate Data

Monthly Average Climate Data for Clinton Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.6 °F29.9 °F1.54 in.
February17.2 °F34.4 °F1.77 in.
March28.0 °F47.1 °F2.49 in.
April39.1 °F60.6 °F3.6 in.
May50.9 °F71.9 °F4.47 in.
June60.9 °F81.1 °F5.0 in.
July64.4 °F84.2 °F4.0 in.
August62.2 °F82.3 °F3.9 in.
September53.9 °F76.2 °F3.65 in.
October42.2 °F63.4 °F2.73 in.
November30.4 °F48.1 °F2.32 in.
December20.0 °F35.3 °F1.91 in.
Annual40.2 °F59.5 °F37.38 in.

Climate Data for Clinton Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation