Early Iowa Climate Data

Monthly Average Climate Data for Early Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.8 °F26.7 °F0.76 in.
February12.8 °F31.2 °F0.94 in.
March24.7 °F44.9 °F1.82 in.
April35.6 °F58.7 °F3.53 in.
May48.3 °F70.3 °F4.52 in.
June59.3 °F80.3 °F5.14 in.
July62.8 °F83.0 °F3.57 in.
August60.0 °F80.7 °F4.38 in.
September51.1 °F75.2 °F2.96 in.
October38.5 °F61.9 °F2.34 in.
November25.6 °F45.5 °F1.47 in.
December14.9 °F31.9 °F1.12 in.
Annual36.9 °F57.5 °F32.55 in.

Climate Data for Early Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost150-180 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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