Ahtanum Washington Climate Data

Monthly Average Climate Data for Ahtanum Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.2 °F38.3 °F1.52 in.
February26.6 °F45.8 °F0.96 in.
March31.1 °F54.6 °F0.77 in.
April36.0 °F62.6 °F0.67 in.
May43.8 °F72.0 °F0.85 in.
June49.5 °F78.5 °F0.52 in.
July55.1 °F87.6 °F0.24 in.
August54.0 °F86.9 °F0.19 in.
September46.1 °F78.1 °F0.3 in.
October36.6 °F63.6 °F0.73 in.
November28.6 °F48.2 °F1.03 in.
December23.3 °F37.4 °F1.48 in.
Annual37.9 °F62.8 °F9.26 in.

Climate Data for Ahtanum Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
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