Kennewick Washington Climate Data

Monthly Average Climate Data for Kennewick Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-1.7 °C5.3 °C30.99 mm
February-1.2 °C8.8 °C21.34 mm
March1.6 °C14.3 °C17.02 mm
April4.7 °C18.8 °C17.27 mm
May8.8 °C23.9 °C22.61 mm
June12.3 °C27.7 °C16.51 mm
July15.4 °C32.8 °C5.59 mm
August14.9 °C32.2 °C4.57 mm
September10.4 °C26.8 °C6.86 mm
October5.2 °C18.6 °C17.53 mm
November1 °C10.4 °C22.86 mm
December-1.8 °C5 °C29.72 mm
Annual5.8 °C18.7 °C212.87 mm

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 : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBWk - Cold Desert Climate