Steilacoom Washington Climate Data

Monthly Average Climate Data for Steilacoom Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.7 °C8.4 °C156.72 mm
February1.5 °C9.9 °C104.9 mm
March2.8 °C12.2 °C119.38 mm
April4.6 °C14.9 °C84.58 mm
May7.6 °C18.8 °C57.15 mm
June10.2 °C21.2 °C40.39 mm
July12.2 °C24.8 °C13.72 mm
August12.2 °C25.2 °C26.67 mm
September9.8 °C22 °C38.61 mm
October6.4 °C15.7 °C104.65 mm
November3.3 °C10.9 °C166.37 mm
December1.4 °C7.8 °C162.05 mm
Annual6.1 °C16 °C1075.19 mm

Climate Data for Steilacoom Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost40-50 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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