Belmont, MA Weather & Growing Conditions
Tonight
52°F
Partly Cloudy
Partly cloudy, with a low around 52. Southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Partly Cloudy | 6 mph SW | 4% |
| Wednesday | 77°F | Mostly Sunny | 6 to 10 mph SW | 5% |
| Wednesday Night | 56°F | Partly Cloudy | 9 mph SW | 3% |
| Thursday | 75°F | Mostly Cloudy | 7 to 12 mph SW | 14% |
| Thursday Night | 63°F | Mostly Cloudy then Chance Light Rain | 6 to 9 mph SW | 53% |
| Friday | 70°F | Rain | 6 mph S | 84% |
| Friday Night | 56°F | Rain | 6 mph S | 84% |
| Saturday | 64°F | Light Rain | 8 mph NW | 75% |
| Saturday Night | 45°F | Chance Light Rain | 7 mph NW | 48% |
| Sunday | 60°F | Chance Light Rain then Mostly Sunny | 8 mph W | 25% |
| Sunday Night | 40°F | Partly Cloudy | 6 mph W | 10% |
| Monday | 58°F | Slight Chance Light Rain | 7 to 12 mph W | 20% |
| Monday Night | 39°F | Slight Chance Light Rain | 8 mph W | 20% |
| Tuesday | 59°F | Mostly Sunny | 9 to 13 mph SW | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Belmont, MA
Last spring frost
Apr 19
First fall frost
Oct 23
Growing season
185 days
Hardiness zone
6b
Explore more for Belmont, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, Jamaica Plain, Ma (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.