Hamilton Washington Climate Data

Monthly Average Climate Data for Hamilton Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.6 °F44.1 °F6.21 in.
February33.9 °F47.5 °F4.36 in.
March36.3 °F52.4 °F5.25 in.
April40.2 °F58.4 °F3.92 in.
May45.4 °F65.3 °F3.13 in.
June49.7 °F69.1 °F2.36 in.
July52.3 °F75.3 °F1.14 in.
August52.4 °F76.5 °F1.37 in.
September48.7 °F70.6 °F2.64 in.
October42.7 °F59.9 °F5.54 in.
November37.7 °F49.4 °F10.08 in.
December33.7 °F43.4 °F6.26 in.
Annual42.2 °F59.3 °F52.26 in.

Climate Data for Hamilton Washington

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfb - Temperate Oceanic Climate
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