Harman US

Broomfield, CO Weather & Growing Conditions

Tonight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. West wind around 3 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Tonight 55°F Partly Cloudy 3 mph W 6%
Saturday 75°F Partly Sunny then Chance Showers And Thunderstorms 2 to 8 mph NNW 68%
Saturday Night 51°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 2 to 6 mph W 55%
Sunday 70°F Showers And Thunderstorms Likely 2 to 7 mph NE 56%
Sunday Night 49°F Chance Showers And Thunderstorms then Partly Cloudy 1 to 6 mph SE 34%
Monday 72°F Mostly Sunny 1 to 7 mph NE 2%
Monday Night 50°F Mostly Clear 2 to 7 mph N 13%
Tuesday 75°F Mostly Sunny 2 to 6 mph NNE 10%
Tuesday Night 53°F Slight Chance Showers And Thunderstorms then Partly Cloudy 6 mph SW 18%
Wednesday 76°F Partly Sunny 6 mph NNE 12%
Wednesday Night 53°F Slight Chance Rain Showers then Mostly Cloudy 5 mph SW 17%
Thursday 77°F Mostly Sunny 6 mph N 11%
Thursday Night 54°F Chance Rain Showers then Mostly Cloudy 2 to 6 mph S 28%
Friday 78°F Mostly Sunny 2 to 7 mph S 14%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Broomfield, CO

Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a

Explore more for Broomfield, CO: full frost dates · planting calendar · Colorado frost dates

Climate data from the nearest NOAA station, Northglenn, Co (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.