Broomfield, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Broomfield, a city in Broomfield County, Colorado.
This Afternoon
83°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 83, with temperatures falling to around 74 in the afternoon. West wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Broomfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Chance Showers And Thunderstorms | 7 mph W | 45% |
| Tonight | 56°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 7 mph WSW | 35% |
| Saturday | 75°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph NW | 68% |
| Saturday Night | 52°F | Chance Showers And Thunderstorms | 2 to 6 mph WNW | 54% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 2 to 7 mph NE | 55% |
| Sunday Night | 50°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph SSE | 34% |
| Monday | 74°F | Mostly Sunny | 1 to 6 mph NE | 2% |
| Monday Night | 52°F | Mostly Clear | 1 to 6 mph N | 12% |
| Tuesday | 76°F | Mostly Sunny | 1 to 6 mph NNE | 11% |
| Tuesday Night | 54°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SW | 18% |
| Wednesday | 77°F | Partly Sunny | 2 to 6 mph NNE | 13% |
| Wednesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph SW | 17% |
| Thursday | 77°F | Mostly Sunny | 2 to 6 mph NNW | 12% |
| Thursday Night | 55°F | Chance Rain Showers then Mostly Cloudy | 1 to 5 mph SSW | 28% |
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 Sep 19, 2026.