Griswold Iowa Climate Data

Monthly Average Climate Data for Griswold Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.3 °F31.3 °F0.83 in.
February16.3 °F36.2 °F1.1 in.
March27.5 °F49.5 °F1.91 in.
April37.9 °F62.2 °F3.5 in.
May50.3 °F72.5 °F5.46 in.
June60.9 °F82.1 °F5.12 in.
July64.7 °F85.5 °F3.9 in.
August62.0 °F83.8 °F3.93 in.
September52.4 °F77.6 °F3.38 in.
October40.2 °F64.9 °F2.85 in.
November27.6 °F48.9 °F1.7 in.
December17.7 °F36.2 °F1.31 in.
Annual39.2 °F60.9 °F34.99 in.

Climate Data for Griswold Iowa

Average First Frost DateOct. 1 - Oct. 10
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 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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