Oconomowoc Lake Wisconsin Climate Data

Monthly Average Climate Data for Oconomowoc Lake Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.1 °F27.2 °F1.65 in.
February13.7 °F30.8 °F1.6 in.
March23.8 °F42.5 °F2.05 in.
April35.1 °F55.7 °F3.76 in.
May46.4 °F67.7 °F4.12 in.
June56.4 °F77.5 °F4.86 in.
July60.8 °F81.6 °F4.09 in.
August59.0 °F79.9 °F4.03 in.
September50.9 °F73.1 °F3.32 in.
October39.6 °F59.9 °F2.87 in.
November28.4 °F45.3 °F2.17 in.
December17.9 °F32.7 °F1.89 in.
Annual36.9 °F56.2 °F36.41 in.

Climate Data for Oconomowoc Lake Wisconsin

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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