Kennewick Washington Climate Data

Monthly Average Climate Data for Kennewick Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January28.9 °F41.5 °F1.22 in.
February29.9 °F47.9 °F0.84 in.
March34.9 °F57.7 °F0.67 in.
April40.5 °F65.8 °F0.68 in.
May47.8 °F75.0 °F0.89 in.
June54.1 °F81.8 °F0.65 in.
July59.7 °F91.0 °F0.22 in.
August58.8 °F89.9 °F0.18 in.
September50.8 °F80.2 °F0.27 in.
October41.4 °F65.5 °F0.69 in.
November33.8 °F50.7 °F0.9 in.
December28.7 °F41.0 °F1.17 in.
Annual42.4 °F65.7 °F8.38 in.

Climate Data for Kennewick 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