Granby, MA Weather & Growing Conditions
Tonight
45°F
Partly Cloudy
Partly cloudy, with a low around 45. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Partly Cloudy | 3 mph SE | 4% |
| Sunday | 59°F | Rain Showers | 1 to 7 mph SE | 100% |
| Sunday Night | 52°F | Rain Showers | 3 to 9 mph NE | 90% |
| Monday | 68°F | Patchy Fog then Partly Sunny | 8 to 12 mph N | 5% |
| Monday Night | 45°F | Mostly Cloudy | 8 mph N | 2% |
| Tuesday | 64°F | Partly Sunny | 9 mph NE | 2% |
| Tuesday Night | 44°F | Mostly Cloudy | 5 to 10 mph NE | 2% |
| Wednesday | 65°F | Mostly Sunny | 10 to 15 mph NE | 2% |
| Wednesday Night | 44°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 14 mph NE | 15% |
| Thursday | 64°F | Slight Chance Rain Showers | 13 to 16 mph NE | 23% |
| Thursday Night | 45°F | Chance Rain Showers | 13 to 17 mph NE | 35% |
| Friday | 64°F | Chance Rain Showers | 17 mph N | 36% |
| Friday Night | 47°F | Chance Rain Showers | 17 mph N | 37% |
| Saturday | 67°F | Chance Rain Showers | 17 mph N | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Granby, MA
Last spring frost
May 3
First fall frost
Oct 14
Growing season
164 days
Hardiness zone
6a
Explore more for Granby, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, Belchertown, Ma (8.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.