Zillah Washington Climate Data

Monthly Average Climate Data for Zillah Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-3.6 °C4.1 °C25.91 mm
February-2.6 °C8.3 °C18.29 mm
March0.1 °C13.4 °C15.24 mm
April2.8 °C17.7 °C13.72 mm
May7.1 °C22.8 °C20.32 mm
June10.3 °C26.3 °C16.76 mm
July13.3 °C31.4 °C6.6 mm
August12.4 °C30.7 °C5.33 mm
September8.2 °C25.9 °C5.33 mm
October3.1 °C18 °C18.03 mm
November-1.4 °C9.6 °C23.88 mm
December-4 °C3.4 °C28.96 mm
Annual3.8 °C17.6 °C198.37 mm

Climate Data for Zillah Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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