Onalaska Washington Climate Data

Monthly Average Climate Data for Onalaska Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.7 °F45.9 °F8.13 in.
February33.4 °F49.8 °F5.66 in.
March35.5 °F54.4 °F6.39 in.
April38.5 °F60.1 °F5.12 in.
May43.8 °F67.5 °F3.39 in.
June47.9 °F72.1 °F2.71 in.
July51.5 °F79.3 °F0.97 in.
August51.4 °F80.4 °F1.1 in.
September47.1 °F74.2 °F2.32 in.
October41.4 °F61.8 °F5.62 in.
November36.5 °F50.9 °F9.12 in.
December33.3 °F44.8 °F8.87 in.
Annual41.2 °F61.8 °F59.4 in.

Climate Data for Onalaska Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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