Mill Creek Washington Climate Data

Monthly Average Climate Data for Mill Creek Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January2.2 °C7.9 °C144.78 mm
February2.2 °C9.2 °C111 mm
March3.5 °C11.4 °C121.67 mm
April5.3 °C13.8 °C91.95 mm
May8.2 °C17.6 °C68.07 mm
June10.3 °C19.7 °C52.07 mm
July12.3 °C23 °C23.11 mm
August12.6 °C23.5 °C28.45 mm
September10.7 °C20.6 °C54.61 mm
October7.3 °C14.8 °C105.16 mm
November3.9 °C10.3 °C171.96 mm
December2.1 °C7.4 °C152.15 mm
Annual6.7 °C14.9 °C1124.98 mm

Climate Data for Mill Creek Washington

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost30-40 Days
Plant Hardiness Zone - 2023Zone 9a : -6.7°C to -3.9°C
Plant Hardiness Zone - 2012Zone 8b : -9.4°C to -6.7°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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