Lake Mills Iowa Climate Data

Monthly Average Climate Data for Lake Mills Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January6.5 °F23.3 °F0.99 in.
February10.9 °F28.1 °F1.03 in.
March23.2 °F40.4 °F1.94 in.
April35.0 °F56.2 °F3.83 in.
May47.6 °F68.6 °F5.03 in.
June58.4 °F78.4 °F5.5 in.
July61.6 °F81.6 °F4.58 in.
August58.9 °F79.3 °F4.08 in.
September50.2 °F73.1 °F3.39 in.
October37.7 °F59.7 °F2.45 in.
November25.7 °F43.1 °F1.67 in.
December13.4 °F29.0 °F1.34 in.
Annual35.8 °F55.1 °F35.83 in.

Climate Data for Lake Mills Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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