Winthrop Washington Climate Data

Monthly Average Climate Data for Winthrop Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.6 °F31.0 °F2.04 in.
February19.3 °F38.7 °F1.22 in.
March26.0 °F49.5 °F1.23 in.
April32.7 °F60.6 °F0.86 in.
May40.2 °F70.6 °F1.07 in.
June46.5 °F76.6 °F1.1 in.
July51.7 °F86.0 °F0.65 in.
August50.6 °F86.1 °F0.47 in.
September42.8 °F76.9 °F0.43 in.
October33.3 °F60.5 °F1.22 in.
November25.4 °F41.8 °F2.0 in.
December16.7 °F29.8 °F2.39 in.
Annual33.5 °F59 °F14.68 in.

Climate Data for Winthrop Washington

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer