Royal City Washington Climate Data

Monthly Average Climate Data for Royal City Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January25.3 °F37.8 °F1.02 in.
February28.1 °F44.9 °F0.66 in.
March32.9 °F54.6 °F0.69 in.
April38.5 °F62.9 °F0.63 in.
May46.0 °F72.1 °F0.55 in.
June51.9 °F78.7 °F0.66 in.
July58.1 °F87.8 °F0.38 in.
August57.3 °F87.0 °F0.17 in.
September49.5 °F78.2 °F0.22 in.
October39.5 °F63.6 °F0.65 in.
November30.7 °F47.6 °F0.9 in.
December24.9 °F37.1 °F1.12 in.
Annual40.2 °F62.7 °F7.65 in.

Climate Data for Royal City Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBWk - Cold Desert Climate