Grand Junction Colorado Climate Data

Monthly Average Climate Data for Grand Junction Colorado

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.1 °C3.9 °C14.99 mm
February-3.9 °C8.3 °C14.73 mm
March0.3 °C14.8 °C19.81 mm
April3.8 °C18.8 °C23.37 mm
May9 °C24.6 °C22.1 mm
June13.8 °C31.3 °C11.94 mm
July17.6 °C34.3 °C19.56 mm
August16.6 °C32.5 °C20.07 mm
September11.3 °C27.8 °C30.99 mm
October4.7 °C19.9 °C27.69 mm
November-1.7 °C11.6 °C15.24 mm
December-6.8 °C4.3 °C12.95 mm
Annual4.8 °C19.3 °C233.44 mm

Climate Data for Grand Junction Colorado

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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