Walnut Iowa Climate Data

Monthly Average Climate Data for Walnut Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.1 °F29.8 °F0.82 in.
February15.3 °F34.6 °F1.09 in.
March26.3 °F48.1 °F1.89 in.
April37.1 °F60.9 °F3.56 in.
May49.5 °F71.2 °F5.24 in.
June59.9 °F81.0 °F4.87 in.
July63.5 °F84.3 °F3.86 in.
August60.6 °F82.3 °F3.97 in.
September51.4 °F76.4 °F3.36 in.
October39.7 °F63.8 °F2.74 in.
November27.1 °F47.7 °F1.56 in.
December17.4 °F34.9 °F1.32 in.
Annual38.2 °F59.6 °F34.28 in.

Climate Data for Walnut Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°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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