Jamestown Colorado Climate Data

Monthly Average Climate Data for Jamestown Colorado

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.7 °F40.7 °F0.76 in.
February19.7 °F41.6 °F1.12 in.
March25.2 °F49.0 °F1.97 in.
April30.1 °F54.6 °F3.15 in.
May38.9 °F63.3 °F3.17 in.
June47.4 °F75.2 °F1.96 in.
July54.2 °F81.5 °F2.4 in.
August52.6 °F79.4 °F1.95 in.
September45.2 °F72.1 °F1.88 in.
October35.0 °F59.4 °F1.44 in.
November26.5 °F48.5 °F0.94 in.
December20.3 °F40.5 °F0.87 in.
Annual34.7 °F58.8 °F21.61 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
2024 plantmaps.com