Sunnyside Washington Climate Data

Monthly Average Climate Data for Sunnyside Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.1 °F39.7 °F1.01 in.
February27.4 °F47.1 °F0.66 in.
March31.9 °F56.5 °F0.51 in.
April36.6 °F64.2 °F0.52 in.
May44.4 °F73.3 °F0.69 in.
June50.1 °F79.7 °F0.68 in.
July55.0 °F88.8 °F0.18 in.
August53.7 °F87.5 °F0.18 in.
September46.4 °F78.6 °F0.25 in.
October37.6 °F64.5 °F0.77 in.
November30.0 °F49.5 °F0.84 in.
December25.6 °F38.8 °F1.01 in.
Annual38.7 °F64 °F7.3 in.

Climate Data for Sunnyside Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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 ClassificationBSk - Cold Semi-Arid Climate