Onalaska Washington Climate Data

Monthly Average Climate Data for Onalaska Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January0.9 °C7.7 °C206.5 mm
February0.8 °C9.9 °C143.76 mm
March1.9 °C12.4 °C162.31 mm
April3.6 °C15.6 °C130.05 mm
May6.6 °C19.7 °C86.11 mm
June8.8 °C22.3 °C68.83 mm
July10.8 °C26.3 °C24.64 mm
August10.8 °C26.9 °C27.94 mm
September8.4 °C23.4 °C58.93 mm
October5.2 °C16.6 °C142.75 mm
November2.5 °C10.5 °C231.65 mm
December0.7 °C7.1 °C225.3 mm
Annual5.1 °C16.5 °C1508.77 mm

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 : -9.4°C to -6.7°C
Plant Hardiness Zone - 2012Zone 8a : -12.2°C to -9.4°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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