Hartline Washington Climate Data

Monthly Average Climate Data for Hartline Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.3 °C1.1 °C32.77 mm
February-3.8 °C4.5 °C21.84 mm
March-0.9 °C10.2 °C25.4 mm
April1.6 °C15.6 °C21.59 mm
May5.8 °C20.8 °C26.67 mm
June9 °C24.8 °C21.08 mm
July12.8 °C30.6 °C12.19 mm
August12.5 °C30.3 °C7.11 mm
September8.2 °C24.8 °C6.86 mm
October2.7 °C16.1 °C18.03 mm
November-2.1 °C6.8 °C31.5 mm
December-5.2 °C1.1 °C36.32 mm
Annual2.9 °C15.6 °C261.36 mm

Climate Data for Hartline Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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