Henderson Iowa Climate Data

Monthly Average Climate Data for Henderson Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.9 °F32.2 °F0.79 in.
February16.8 °F37.1 °F0.96 in.
March27.9 °F50.4 °F1.81 in.
April38.6 °F62.9 °F3.38 in.
May51.1 °F73.2 °F5.45 in.
June61.8 °F82.8 °F5.22 in.
July65.6 °F86.2 °F3.94 in.
August62.9 °F84.5 °F3.87 in.
September53.3 °F78.2 °F3.45 in.
October40.8 °F65.5 °F2.87 in.
November28.2 °F49.6 °F1.6 in.
December18.3 °F36.9 °F1.3 in.
Annual39.9 °F61.6 °F34.64 in.

Climate Data for Henderson 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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