Riverside Washington Climate Data

Monthly Average Climate Data for Riverside Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.8 °C1.1 °C35.31 mm
February-3.6 °C5.1 °C25.65 mm
March-0.3 °C11.9 °C29.72 mm
April3.1 °C17.7 °C23.11 mm
May7.2 °C23.1 °C32 mm
June10.7 °C26.8 °C29.21 mm
July14 °C32 °C19.56 mm
August13.4 °C31.8 °C9.4 mm
September8.6 °C26.1 °C11.18 mm
October3.2 °C16.8 °C21.84 mm
November-1.2 °C7.2 °C39.12 mm
December-4.2 °C1.5 °C45.97 mm
Annual3.8 °C16.8 °C322.07 mm

Climate Data for Riverside Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
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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