Broomfield, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Broomfield, a city in Broomfield County, Colorado.
Today
79°F
Patchy Smoke
Patchy smoke. Mostly sunny. High near 79, with temperatures falling to around 77 in the afternoon. East northeast wind 6 to 9 mph.
7-day forecast for Broomfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Patchy Smoke | 6 to 9 mph ENE | 13% |
| Tonight | 57°F | Patchy Smoke | 5 to 9 mph NNE | 10% |
| Wednesday | 87°F | Patchy Smoke | 5 to 9 mph NE | 0% |
| Wednesday Night | 60°F | Mostly Clear | 3 to 9 mph SE | 2% |
| Thursday | 95°F | Sunny | 2 to 8 mph N | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 to 8 mph SW | 2% |
| Friday | 98°F | Sunny | 3 to 9 mph SSE | 0% |
| Friday Night | 67°F | Mostly Clear | 9 mph S | 0% |
| Saturday | 99°F | Sunny | 3 to 9 mph N | 1% |
| Saturday Night | 67°F | Partly Cloudy | 5 to 9 mph W | 0% |
| Sunday | 99°F | Sunny | 3 to 9 mph E | 7% |
| Sunday Night | 68°F | Partly Cloudy | 5 to 9 mph WNW | 4% |
| Monday | 98°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 12 mph N | 19% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 12 mph WNW | 15% |
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 Aug 4, 2026.