Oconomowoc Wisconsin Climate Data

Monthly Average Climate Data for Oconomowoc Wisconsin

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.6 °C-2.7 °C41.66 mm
February-10.1 °C-0.6 °C40.39 mm
March-4.4 °C5.9 °C52.07 mm
April1.8 °C13.3 °C95.5 mm
May8.2 °C19.9 °C104.9 mm
June13.7 °C25.4 °C124.46 mm
July16.1 °C27.7 °C103.89 mm
August15.1 °C26.7 °C102.87 mm
September10.6 °C22.9 °C84.58 mm
October4.3 °C15.6 °C73.15 mm
November-2 °C7.4 °C55.12 mm
December-7.8 °C0.4 °C47.75 mm
Annual2.8 °C13.5 °C926.34 mm

Climate Data for Oconomowoc Wisconsin

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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