Jamestown Colorado Climate Data

Monthly Average Climate Data for Jamestown Colorado

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.3 °C4.8 °C19.3 mm
February-6.8 °C5.3 °C28.45 mm
March-3.8 °C9.4 °C50.04 mm
April-1.1 °C12.6 °C80.01 mm
May3.8 °C17.4 °C80.52 mm
June8.6 °C24 °C49.78 mm
July12.3 °C27.5 °C60.96 mm
August11.4 °C26.3 °C49.53 mm
September7.3 °C22.3 °C47.75 mm
October1.7 °C15.2 °C36.58 mm
November-3.1 °C9.2 °C23.88 mm
December-6.5 °C4.7 °C22.1 mm
Annual1.5 °C14.9 °C548.9 mm

Climate Data for Jamestown Colorado

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateMay 21 - May 31
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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