Mattawa Washington Climate Data

Monthly Average Climate Data for Mattawa Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.3 °F39.3 °F1.07 in.
February29.2 °F46.6 °F0.68 in.
March34.1 °F56.2 °F0.71 in.
April39.8 °F64.5 °F0.58 in.
May47.6 °F74.0 °F0.58 in.
June54.0 °F80.7 °F0.64 in.
July60.3 °F90.1 °F0.27 in.
August59.2 °F89.0 °F0.13 in.
September50.8 °F79.8 °F0.18 in.
October40.5 °F64.7 °F0.66 in.
November31.9 °F49.0 °F0.92 in.
December26.4 °F39.0 °F1.25 in.
Annual41.7 °F64.4 °F7.67 in.

Climate Data for Mattawa Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBWk - Cold Desert Climate