Granby, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Granby, a town in Grand County, Colorado.
Overnight
45°F
Patchy Smoke
Patchy smoke. Mostly clear. Low around 45, with temperatures rising to around 47 overnight. East wind around 5 mph.
7-day forecast for Granby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Patchy Smoke | 5 mph E | 0% |
| Tuesday | 82°F | Patchy Smoke | 2 to 14 mph SW | 8% |
| Tuesday Night | 42°F | Patchy Smoke | 1 to 10 mph S | 8% |
| Wednesday | 81°F | Sunny then Patchy Smoke | 1 to 15 mph WSW | 0% |
| Wednesday Night | 40°F | Patchy Smoke then Mostly Clear | 1 to 14 mph SSW | 0% |
| Thursday | 83°F | Sunny | 1 to 15 mph WSW | 0% |
| Thursday Night | 44°F | Clear | 1 to 14 mph SW | 0% |
| Friday | 86°F | Sunny | 0 to 12 mph WNW | 0% |
| Friday Night | 46°F | Mostly Clear | 1 to 12 mph ESE | 0% |
| Saturday | 86°F | Sunny | 0 to 10 mph WNW | 1% |
| Saturday Night | 48°F | Mostly Clear | 1 to 9 mph E | 0% |
| Sunday | 86°F | Sunny | 1 to 12 mph W | 4% |
| Sunday Night | 48°F | Partly Cloudy | 1 to 10 mph NE | 6% |
| Monday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 10 mph WSW | 29% |
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 Aug 4, 2026.