Union Gap Washington Climate Data

Monthly Average Climate Data for Union Gap Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4 °C3.8 °C30.48 mm
February-2.7 °C8.2 °C19.81 mm
March-0.2 °C13.3 °C16.76 mm
April2.7 °C17.6 °C14.73 mm
May7.1 °C22.8 °C21.08 mm
June10.2 °C26.4 °C13.97 mm
July13.3 °C31.5 °C6.1 mm
August12.6 °C31 °C5.08 mm
September8.1 °C26.1 °C6.6 mm
October2.8 °C18.1 °C17.78 mm
November-1.7 °C9.5 °C22.61 mm
December-4.4 °C3.3 °C35.05 mm
Annual3.7 °C17.6 °C210.05 mm

Climate Data for Union Gap Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 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 ClassificationBSk - Cold Semi-Arid Climate
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