Diagonal Iowa Climate Data

Monthly Average Climate Data for Diagonal Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.8 °F31.7 °F0.85 in.
February17.0 °F36.8 °F1.28 in.
March27.8 °F49.5 °F2.18 in.
April38.5 °F61.7 °F3.74 in.
May50.5 °F71.6 °F5.47 in.
June60.6 °F80.9 °F5.24 in.
July64.7 °F85.2 °F4.44 in.
August62.2 °F83.6 °F4.26 in.
September53.1 °F76.6 °F3.73 in.
October40.7 °F64.3 °F2.94 in.
November28.7 °F49.3 °F2.05 in.
December18.4 °F36.7 °F1.39 in.
Annual39.6 °F60.7 °F37.57 in.

Climate Data for Diagonal Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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