Greenfield Iowa Climate Data

Monthly Average Climate Data for Greenfield Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.8 °F30.9 °F0.86 in.
February16.8 °F36.1 °F1.23 in.
March27.4 °F48.9 °F2.05 in.
April38.4 °F61.6 °F3.74 in.
May50.4 °F71.7 °F5.0 in.
June60.5 °F81.2 °F4.84 in.
July64.5 °F84.9 °F4.01 in.
August62.2 °F83.3 °F3.91 in.
September53.5 °F76.9 °F3.79 in.
October41.0 °F64.2 °F2.82 in.
November28.7 °F48.7 °F1.88 in.
December18.2 °F35.6 °F1.39 in.
Annual39.5 °F60.3 °F35.52 in.

Climate Data for Greenfield 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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