Hamilton Washington Climate Data

Monthly Average Climate Data for Hamilton Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January0.9 °C6.7 °C157.73 mm
February1.1 °C8.6 °C110.74 mm
March2.4 °C11.3 °C133.35 mm
April4.6 °C14.7 °C99.57 mm
May7.4 °C18.5 °C79.5 mm
June9.8 °C20.6 °C59.94 mm
July11.3 °C24.1 °C28.96 mm
August11.3 °C24.7 °C34.8 mm
September9.3 °C21.4 °C67.06 mm
October5.9 °C15.5 °C140.72 mm
November3.2 °C9.7 °C256.03 mm
December0.9 °C6.3 °C159 mm
Annual5.7 °C15.2 °C1327.4 mm

Climate Data for Hamilton Washington

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost50-75 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 ConditionsNormal
Köppen Climate ClassificationCfb - Temperate Oceanic Climate
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