Belmont, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belmont, a community in Middlesex County, Massachusetts.
This Afternoon
80°F
Sunny
Sunny, with a high near 80. Northwest wind around 9 mph, with gusts as high as 22 mph.
7-day forecast for Belmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 9 mph NW | 0% |
| Tonight | 48°F | Partly Cloudy | 6 to 9 mph N | 0% |
| Saturday | 64°F | Sunny | 6 mph NE | 0% |
| Saturday Night | 46°F | Partly Cloudy | 1 to 6 mph SE | 1% |
| Sunday | 64°F | Rain Showers Likely | 2 to 7 mph SE | 73% |
| Sunday Night | 55°F | Rain Showers | 3 to 8 mph E | 84% |
| Monday | 65°F | Chance Rain Showers then Partly Sunny | 7 to 10 mph NE | 33% |
| Monday Night | 52°F | Partly Cloudy | 3 to 9 mph NE | 6% |
| Tuesday | 61°F | Partly Sunny | 12 mph NE | 6% |
| Tuesday Night | 51°F | Mostly Cloudy | 6 to 10 mph NE | 3% |
| Wednesday | 61°F | Partly Sunny | 10 to 15 mph NE | 6% |
| Wednesday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 12 mph NE | 17% |
| Thursday | 60°F | Chance Rain Showers | 14 mph NE | 29% |
| Thursday Night | 51°F | Chance Rain Showers | 8 to 12 mph NE | 38% |
Forecast source: National Weather Service (api.weather.gov) for Belmont (42.395, -71.180). Updated through the day.
Growing snapshot for Belmont
Last spring frost
Apr 19
First fall frost
Oct 23
Growing season
185 days
Hardiness zone
6b
More local growing data for Belmont: nearby ZIP 02478 weather · frost dates · planting calendar · Massachusetts frost dates
Nearby towns & communities
Arlington
Ayer
Burlington
Cochituate
East Pepperell
Everett
Framingham
Groton
Hanscom AFB
Hopkinton
Hudson
Lexington
Littleton Common
Lowell
Malden
Marlborough
Maynard
Medford
Melrose
Newton
Pepperell
Pinehurst
Reading
Shirley
Somerville
Stoneham
Townsend
Wakefield
Waltham
Watertown Town
Climate data from the nearest NOAA station, Jamaica Plain, Ma (7 mi from Belmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.