Oconomowoc Wisconsin Climate Data

Monthly Average Climate Data for Oconomowoc Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.2 °F27.2 °F1.64 in.
February13.8 °F30.9 °F1.59 in.
March24.0 °F42.7 °F2.05 in.
April35.3 °F55.9 °F3.76 in.
May46.7 °F67.9 °F4.13 in.
June56.6 °F77.8 °F4.9 in.
July61.0 °F81.8 °F4.09 in.
August59.2 °F80.1 °F4.05 in.
September51.0 °F73.3 °F3.33 in.
October39.7 °F60.1 °F2.88 in.
November28.4 °F45.4 °F2.17 in.
December17.9 °F32.7 °F1.88 in.
Annual37.1 °F56.3 °F36.47 in.

Climate Data for Oconomowoc Wisconsin

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness ZoneZone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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