Coulee City Washington Climate Data

Monthly Average Climate Data for Coulee City Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.4 °F34.8 °F1.28 in.
February26.1 °F41.5 °F0.85 in.
March31.1 °F51.9 °F0.92 in.
April36.0 °F61.2 °F0.77 in.
May43.7 °F70.7 °F0.85 in.
June49.6 °F77.9 °F0.76 in.
July56.2 °F87.8 °F0.38 in.
August55.5 °F87.4 °F0.22 in.
September47.6 °F77.4 °F0.27 in.
October37.7 °F61.7 °F0.73 in.
November29.4 °F45.3 °F1.1 in.
December23.6 °F34.9 °F1.42 in.
Annual38.3 °F61 °F9.55 in.

Climate Data for Coulee City Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 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 ClassificationBSk - Cold Semi-Arid Climate