Mount Vernon Washington Climate Data

Monthly Average Climate Data for Mount Vernon Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.7 °C7.9 °C109.47 mm
February1.6 °C9.2 °C77.72 mm
March3.1 °C11.4 °C81.79 mm
April4.9 °C14.1 °C74.42 mm
May7.7 °C17.6 °C65.53 mm
June10 °C19.9 °C49.28 mm
July11.5 °C23 °C24.38 mm
August11.4 °C23.5 °C28.7 mm
September9.4 °C20.4 °C49.02 mm
October6.2 °C15.1 °C87.12 mm
November3.5 °C10.5 °C124.46 mm
December1.4 °C7.4 °C101.35 mm
Annual6 °C15 °C873.24 mm

Climate Data for Mount Vernon Washington

Average First Frost DateNov. 1 - Nov. 10
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 8a : -12.2°C to -9.4°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate