Lake Mills Iowa Climate Data

Monthly Average Climate Data for Lake Mills Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-14.2 °C-4.8 °C25.15 mm
February-11.7 °C-2.2 °C26.16 mm
March-4.9 °C4.7 °C49.28 mm
April1.7 °C13.4 °C97.28 mm
May8.7 °C20.3 °C127.76 mm
June14.7 °C25.8 °C139.7 mm
July16.4 °C27.6 °C116.33 mm
August14.9 °C26.3 °C103.63 mm
September10.1 °C22.8 °C86.11 mm
October3.2 °C15.4 °C62.23 mm
November-3.5 °C6.2 °C42.42 mm
December-10.3 °C-1.7 °C34.04 mm
Annual2.1 °C12.8 °C910.09 mm

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 : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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