Broomfield, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Broomfield, a city in Broomfield County, Colorado.
Overnight
36°F
Mostly Cloudy
Mostly cloudy, with a low around 36. Southwest wind around 3 mph.
7-day forecast for Broomfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 36°F | Mostly Cloudy | 3 mph SW | 0% |
| Wednesday | 55°F | Partly Sunny | 2 to 6 mph N | 12% |
| Wednesday Night | 37°F | Mostly Cloudy | 2 to 6 mph NNW | 12% |
| Thursday | 58°F | Sunny | 2 to 6 mph S | 0% |
| Thursday Night | 37°F | Partly Cloudy | 3 mph SW | 1% |
| Friday | 57°F | Mostly Sunny | 5 mph N | 8% |
| Friday Night | 35°F | Mostly Clear | 5 mph WNW | 8% |
| Saturday | 58°F | Sunny | 5 mph ESE | 1% |
| Saturday Night | 35°F | Mostly Clear | 3 mph SSW | 0% |
| Sunday | 64°F | Sunny | 1 to 6 mph S | 0% |
| Sunday Night | 39°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Monday | 64°F | Sunny | 5 mph E | 0% |
| Monday Night | 39°F | Partly Cloudy | 2 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 2 mph ENE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Broomfield (39.954, -105.051). Updated through the day.
Growing snapshot for Broomfield
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
More local growing data for Broomfield: nearby ZIP 80020 weather · frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Northglenn, Co (3.9 mi from Broomfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.