Firestone, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Firestone, a town in Weld County, Colorado.
Tonight
34°F
Mostly Clear
Mostly clear, with a low around 34. South southwest wind around 2 mph.
7-day forecast for Firestone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 34°F | Mostly Clear | 2 mph SSW | 0% |
| Wednesday | 56°F | Mostly Sunny | 3 mph NNE | 4% |
| Wednesday Night | 35°F | Mostly Cloudy | 3 mph NW | 4% |
| Thursday | 59°F | Sunny | 3 mph SSE | 0% |
| Thursday Night | 34°F | Partly Cloudy | 2 mph WSW | 1% |
| Friday | 58°F | Mostly Sunny | 1 to 5 mph ENE | 5% |
| Friday Night | 34°F | Mostly Clear | 2 mph SW | 5% |
| Saturday | 60°F | Sunny | 1 to 5 mph S | 0% |
| Saturday Night | 33°F | Mostly Clear | 2 mph SW | 0% |
| Sunday | 66°F | Sunny | 3 mph S | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 65°F | Sunny | 5 mph SSE | 0% |
| Monday Night | 38°F | Partly Cloudy | 2 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 3 mph SE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Firestone (40.156, -104.949). Updated through the day.
Growing snapshot for Firestone
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b
More local growing data for Firestone: nearby ZIP 80520 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
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Ault
Berthoud
Briggsdale
Dacono
Eaton
Erie
Evans
Fort Lupton
Frederick
Garden City
Gilcrest
Greeley
Grover
Hudson
Johnstown
Keenesburg
Kersey
La Salle
Mead
Milliken
Nunn
Orchard
Pierce
Platteville
Raymer (New Raymer)
Severance
Windsor
Climate data from the nearest NOAA station, Longmont 2 Ese, Co (8.5 mi from Firestone). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.