Ahtanum Washington Climate Data

Monthly Average Climate Data for Ahtanum Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.3 °C3.5 °C38.61 mm
February-3 °C7.7 °C24.38 mm
March-0.5 °C12.6 °C19.56 mm
April2.2 °C17 °C17.02 mm
May6.6 °C22.2 °C21.59 mm
June9.7 °C25.8 °C13.21 mm
July12.8 °C30.9 °C6.1 mm
August12.2 °C30.5 °C4.83 mm
September7.8 °C25.6 °C7.62 mm
October2.6 °C17.6 °C18.54 mm
November-1.9 °C9 °C26.16 mm
December-4.8 °C3 °C37.59 mm
Annual3.3 °C17.1 °C235.21 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
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