Marlborough, MA Weather & Growing Conditions
Today
66°F
Mostly Sunny
Mostly sunny, with a high near 66. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Mostly Sunny | 5 mph NE | 0% |
| Tonight | 45°F | Partly Cloudy | 3 mph SE | 0% |
| Sunday | 61°F | Mostly Cloudy then Slight Chance Rain Showers | 1 to 6 mph SE | 84% |
| Sunday Night | 49°F | Rain Showers | 3 to 8 mph NE | 81% |
| Monday | 65°F | Partly Sunny | 8 mph N | 12% |
| Monday Night | 46°F | Mostly Cloudy | 2 to 6 mph N | 2% |
| Tuesday | 61°F | Partly Sunny | 6 to 9 mph NE | 2% |
| Tuesday Night | 45°F | Mostly Cloudy | 3 to 7 mph NE | 2% |
| Wednesday | 62°F | Partly Sunny | 7 to 13 mph NE | 3% |
| Wednesday Night | 45°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 9 mph NE | 20% |
| Thursday | 60°F | Chance Rain Showers | 8 to 12 mph NE | 32% |
| Thursday Night | 46°F | Chance Rain Showers | 12 mph NE | 36% |
| Friday | 61°F | Chance Rain Showers | 12 mph N | 35% |
| Friday Night | 47°F | Chance Rain Showers | 12 mph N | 36% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marlborough, MA
Last spring frost
May 2
First fall frost
Oct 6
Growing season
156 days
Hardiness zone
6b
Explore more for Marlborough, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, Maynard 2, Ma (7.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.