Walla Walla Washington Climate Data

Monthly Average Climate Data for Walla Walla Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January29.1 °F41.7 °F1.93 in.
February31.0 °F46.9 °F1.52 in.
March35.4 °F55.9 °F1.76 in.
April40.1 °F63.2 °F1.75 in.
May46.7 °F71.8 °F1.85 in.
June52.5 °F78.9 °F1.23 in.
July58.3 °F89.4 °F0.36 in.
August57.6 °F88.8 °F0.44 in.
September49.9 °F79.1 °F0.65 in.
October41.0 °F64.4 °F1.44 in.
November33.7 °F49.7 °F1.96 in.
December29.0 °F41.0 °F2.09 in.
Annual42 °F64.2 °F16.98 in.

Climate Data for Walla Walla 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 ClassificationCsa - Hot-Summer Mediterranean Climate
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