Barnum Iowa Climate Data

Monthly Average Climate Data for Barnum Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.7 °F26.2 °F0.87 in.
February12.7 °F30.6 °F1.13 in.
March24.7 °F44.1 °F2.01 in.
April35.8 °F58.9 °F3.73 in.
May48.5 °F70.1 °F4.95 in.
June59.4 °F80.0 °F5.3 in.
July62.9 °F83.0 °F4.02 in.
August60.0 °F80.7 °F4.49 in.
September50.8 °F74.7 °F3.08 in.
October38.4 °F61.8 °F2.49 in.
November25.8 °F45.3 °F1.61 in.
December14.9 °F31.6 °F1.3 in.
Annual36.9 °F57.3 °F34.98 in.

Climate Data for Barnum 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 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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