Richland Washington Climate Data

Monthly Average Climate Data for Richland Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-2 °C5.2 °C28.19 mm
February-1.6 °C8.8 °C20.07 mm
March1.3 °C14.3 °C16 mm
April4.4 °C18.9 °C16.26 mm
May8.6 °C24 °C18.8 mm
June12.1 °C27.7 °C15.75 mm
July15.2 °C32.9 °C4.32 mm
August14.8 °C32.3 °C6.35 mm
September10.3 °C26.9 °C5.59 mm
October4.9 °C18.7 °C16.26 mm
November0.7 °C10.4 °C23.62 mm
December-2.1 °C4.9 °C29.72 mm
Annual42 °C65.8 °C7.91 mm

Climate Data for Richland Washington

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness ZoneZone 7b : -15°C to -12.2°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBWk - Cold Desert Climate