West Richland Washington Climate Data

Monthly Average Climate Data for West Richland Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January28.3 °F41.1 °F1.13 in.
February29.2 °F47.8 °F0.82 in.
March34.3 °F57.7 °F0.65 in.
April39.8 °F65.9 °F0.66 in.
May47.3 °F75.1 °F0.78 in.
June53.7 °F81.9 °F0.66 in.
July59.4 °F91.1 °F0.16 in.
August58.7 °F90.1 °F0.29 in.
September50.7 °F80.5 °F0.21 in.
October40.9 °F65.6 °F0.67 in.
November33.1 °F50.6 °F0.96 in.
December28.1 °F40.7 °F1.2 in.
Annual42 °F65.7 °F8.19 in.

Climate Data for West Richland Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBWk - Cold Desert Climate
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