Chehalis Washington Climate Data

Monthly Average Climate Data for Chehalis Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.7 °C8.2 °C171.96 mm
February1.4 °C10.2 °C119.63 mm
March2.4 °C12.7 °C132.59 mm
April3.9 °C15.8 °C90.93 mm
May7 °C19.7 °C58.17 mm
June9.3 °C22.2 °C43.69 mm
July11.3 °C25.9 °C13.97 mm
August11.3 °C26.6 °C20.57 mm
September8.9 °C23.4 °C42.67 mm
October5.9 °C16.8 °C113.03 mm
November3.2 °C11 °C198.37 mm
December1.4 °C7.6 °C191.01 mm
Annual5.6 °C16.7 °C1196.59 mm

Climate Data for Chehalis Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : -9.4°C to -6.7°C
Plant Hardiness Zone - 2012Zone 8b : -9.4°C to -6.7°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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