River Road Washington Climate Data

Monthly Average Climate Data for River Road Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.2 °F45.4 °F2.6 in.
February35.1 °F47.3 °F2.03 in.
March36.8 °F51.2 °F1.96 in.
April40.2 °F58.2 °F1.52 in.
May44.9 °F64.5 °F1.36 in.
June49.0 °F67.5 °F1.15 in.
July52.4 °F72.0 °F0.66 in.
August52.5 °F72.7 °F0.61 in.
September49.6 °F68.2 °F0.97 in.
October43.7 °F60.2 °F1.86 in.
November38.3 °F49.8 °F3.07 in.
December34.9 °F45.1 °F2.77 in.
Annual42.7 °F58.5 °F20.56 in.

Climate Data for River Road Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 8a : 10°F to 15°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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