Denver Colorado Climate Data

Monthly Average Climate Data for Denver Colorado

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.4 °F46.4 °F0.51 in.
February20.8 °F47.2 °F0.61 in.
March28.7 °F56.2 °F1.3 in.
April35.3 °F62.0 °F2.09 in.
May44.4 °F70.8 °F2.35 in.
June54.0 °F83.0 °F1.64 in.
July60.2 °F89.2 °F2.01 in.
August58.2 °F86.9 °F1.72 in.
September49.5 °F79.2 °F1.19 in.
October37.0 °F65.9 °F1.1 in.
November27.1 °F54.3 °F0.75 in.
December19.1 °F45.5 °F0.53 in.
Annual37.8 °F65.6 °F15.8 in.

Climate Data for Denver Colorado

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate