Green River Wyoming Climate Data

Monthly Average Climate Data for Green River Wyoming

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-13.3 °C0.9 °C15.24 mm
February-11.3 °C3 °C13.72 mm
March-5.8 °C8.9 °C20.07 mm
April-2.2 °C13.9 °C29.97 mm
May2.6 °C19.4 °C39.62 mm
June6.9 °C25.9 °C24.64 mm
July10.5 °C30.7 °C12.95 mm
August9.5 °C29.7 °C16 mm
September4.3 °C24.4 °C25.4 mm
October-1.5 °C16.3 °C26.67 mm
November-7.1 °C7.6 °C17.02 mm
December-12.3 °C1.3 °C13.21 mm
Annual-1.6 °C15.2 °C254.51 mm

Climate Data for Green River Wyoming

Average First Frost DateSep.1 - Sep. 10
Average Last Frost DateJun. 21 - Jun. 30
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5a : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 4b : -31.7°C to -28.9°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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