Green Mountain Iowa Climate Data

Monthly Average Climate Data for Green Mountain Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.4 °F27.3 °F1.03 in.
February14.2 °F32.1 °F1.16 in.
March25.5 °F45.1 °F2.05 in.
April36.8 °F59.3 °F3.75 in.
May49.5 °F70.6 °F5.02 in.
June60.1 °F80.2 °F5.44 in.
July63.3 °F83.4 °F4.25 in.
August60.6 °F81.3 °F4.19 in.
September51.7 °F75.5 °F3.47 in.
October39.5 °F62.0 °F2.64 in.
November27.3 °F46.2 °F1.97 in.
December16.6 °F33.1 °F1.48 in.
Annual38 °F58 °F36.45 in.

Climate Data for Green Mountain 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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