Broomfield Colorado Climate Data

Monthly Average Climate Data for Broomfield Colorado

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.9 °F46.0 °F0.57 in.
February21.0 °F46.9 °F0.69 in.
March28.4 °F55.7 °F1.56 in.
April34.5 °F61.5 °F2.34 in.
May43.6 °F70.3 °F2.62 in.
June52.9 °F82.6 °F1.52 in.
July59.1 °F88.8 °F1.83 in.
August57.1 °F86.6 °F1.6 in.
September48.8 °F78.7 °F1.38 in.
October36.9 °F65.7 °F1.28 in.
November27.3 °F53.9 °F0.84 in.
December19.8 °F45.3 °F0.58 in.
Annual37.4 °F65.2 °F16.81 in.

Climate Data for Broomfield Colorado

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate