Snoqualmie Pass Washington Climate Data

Monthly Average Climate Data for Snoqualmie Pass Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-3.2 °C1.9 °C370.08 mm
February-3 °C3.6 °C219.96 mm
March-1.8 °C6.3 °C290.07 mm
April0.1 °C9.1 °C167.89 mm
May3.2 °C13.8 °C100.33 mm
June6.1 °C16.9 °C70.61 mm
July9.3 °C22 °C37.34 mm
August9.6 °C22.6 °C40.64 mm
September6.9 °C18.8 °C105.66 mm
October3.1 °C11.6 °C201.42 mm
November-0.7 °C4.8 °C351.28 mm
December-3.5 °C1.1 °C303.02 mm
Annual2.2 °C11 °C2258.3 mm

Climate Data for Snoqualmie Pass Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDsc - Continental Subarctic - Cold Dry Summer
2024 plantmaps.com