Firestone, CO Weather & Growing Conditions
Today
57°F
Partly Sunny
Partly sunny. High near 57, with temperatures falling to around 53 in the afternoon. Northeast wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 57°F | Partly Sunny | 1 to 6 mph NE | 7% |
| Tonight | 35°F | Mostly Cloudy | 1 to 6 mph NW | 7% |
| Thursday | 59°F | Sunny | 3 mph S | 0% |
| Thursday Night | 36°F | Partly Cloudy | 2 mph WSW | 1% |
| Friday | 57°F | Mostly Sunny | 1 to 5 mph NNE | 10% |
| Friday Night | 33°F | Mostly Clear | 3 mph WNW | 10% |
| Saturday | 59°F | Sunny | 3 mph SE | 1% |
| Saturday Night | 34°F | Mostly Clear | 2 mph SW | 0% |
| Sunday | 64°F | Sunny | 2 mph SSE | 0% |
| Sunday Night | 37°F | Mostly Clear | 1 to 5 mph WSW | 0% |
| Monday | 64°F | Sunny | 2 mph ESE | 0% |
| Monday Night | 37°F | Partly Cloudy | 2 mph NNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 1 mph NNE | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 2 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Firestone, CO
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b
Explore more for Firestone, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Longmont 2 Ese, Co (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.