Granby, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Granby, a town in Grand County, Colorado.
Tonight
16°F
Mostly Clear
Mostly clear, with a low around 16. South wind around 2 mph.
7-day forecast for Granby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 16°F | Mostly Clear | 2 mph S | 1% |
| Wednesday | 51°F | Chance Rain And Snow Showers | 0 to 7 mph E | 45% |
| Wednesday Night | 16°F | Chance Rain And Snow Showers then Mostly Cloudy | 0 to 5 mph ESE | 38% |
| Thursday | 51°F | Sunny | 0 to 3 mph W | 0% |
| Thursday Night | 17°F | Partly Cloudy | 0 to 3 mph SSE | 4% |
| Friday | 48°F | Mostly Sunny then Slight Chance Snow Showers | 0 to 8 mph WNW | 22% |
| Friday Night | 15°F | Slight Chance Snow Showers then Partly Cloudy | 0 to 3 mph SW | 22% |
| Saturday | 50°F | Sunny | 0 to 6 mph WSW | 6% |
| Saturday Night | 16°F | Clear | 2 mph S | 2% |
| Sunday | 56°F | Sunny | 1 to 7 mph WSW | 0% |
| Sunday Night | 21°F | Mostly Clear | 2 mph WSW | 0% |
| Monday | 58°F | Mostly Sunny | 1 to 5 mph NW | 1% |
| Monday Night | 23°F | Partly Cloudy | 2 mph ENE | 1% |
| Tuesday | 56°F | Mostly Sunny | 1 to 8 mph WNW | 8% |
Forecast source: National Weather Service (api.weather.gov) for Granby (40.065, -105.919). Updated through the day.
Growing snapshot for Granby
Growing season
32 days
Hardiness zone
5b
More local growing data for Granby: nearby ZIP 80478 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fraser, Co (5.9 mi from Granby). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.