Snohomish Washington Climate Data

Monthly Average Climate Data for Snohomish Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.6 °C8.1 °C139.7 mm
February1.6 °C9.8 °C99.82 mm
March2.9 °C12.1 °C119.13 mm
April4.9 °C14.6 °C96.01 mm
May7.8 °C18.3 °C71.88 mm
June10.2 °C20.4 °C63.25 mm
July11.9 °C23.7 °C26.92 mm
August11.8 °C24.3 °C27.69 mm
September9.7 °C21.3 °C57.66 mm
October6.4 °C15.4 °C107.7 mm
November3.4 °C10.7 °C163.32 mm
December1.4 °C7.6 °C151.13 mm
Annual6.1 °C15.5 °C1124.21 mm

Climate Data for Snohomish 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