Snohomish Washington Climate Data

Monthly Average Climate Data for Snohomish Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.8 °F46.6 °F5.5 in.
February34.8 °F49.6 °F3.93 in.
March37.2 °F53.7 °F4.69 in.
April40.9 °F58.2 °F3.78 in.
May46.0 °F64.9 °F2.83 in.
June50.4 °F68.8 °F2.49 in.
July53.5 °F74.7 °F1.06 in.
August53.3 °F75.7 °F1.09 in.
September49.4 °F70.4 °F2.27 in.
October43.5 °F59.8 °F4.24 in.
November38.2 °F51.2 °F6.43 in.
December34.6 °F45.7 °F5.95 in.
Annual43.1 °F59.9 °F44.26 in.

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 : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate