Custer Washington Climate Data

Monthly Average Climate Data for Custer Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.6 °C7.2 °C148.84 mm
February1.8 °C8.7 °C91.69 mm
March3.1 °C10.9 °C115.57 mm
April5.2 °C14.3 °C81.28 mm
May8.1 °C17.7 °C65.53 mm
June10.6 °C20.1 °C48.77 mm
July12.2 °C22.9 °C30.73 mm
August12.1 °C23.2 °C30.99 mm
September9.8 °C20.1 °C58.17 mm
October6.6 °C14.9 °C114.81 mm
November3.7 °C10.1 °C158.5 mm
December1.4 °C6.9 °C138.94 mm
Annual6.4 °C14.8 °C1083.82 mm

Climate Data for Custer Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost50-75 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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