Marlborough, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marlborough, a city in Middlesex County, Massachusetts.
This Afternoon
66°F
Mostly Sunny
Mostly sunny, with a high near 66. East wind around 2 mph.
7-day forecast for Marlborough
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Sunny | 2 mph E | 0% |
| Tonight | 44°F | Partly Cloudy | 1 to 5 mph SE | 1% |
| Sunday | 59°F | Rain Showers | 1 to 6 mph SE | 100% |
| Sunday Night | 52°F | Rain Showers | 5 to 8 mph NE | 99% |
| Monday | 67°F | Patchy Fog then Partly Sunny | 8 mph NE | 13% |
| Monday Night | 47°F | Mostly Cloudy | 5 mph NE | 2% |
| Tuesday | 62°F | Partly Sunny | 5 to 8 mph NE | 2% |
| Tuesday Night | 46°F | Partly Cloudy | 2 to 7 mph NE | 1% |
| Wednesday | 62°F | Partly Sunny | 7 to 12 mph NE | 2% |
| Wednesday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 9 mph NE | 15% |
| Thursday | 62°F | Slight Chance Rain Showers | 8 to 12 mph NE | 24% |
| Thursday Night | 47°F | Chance Rain Showers | 7 to 12 mph NE | 35% |
| Friday | 62°F | Chance Rain Showers | 13 mph NE | 41% |
| Friday Night | 49°F | Chance Rain Showers | 13 mph N | 41% |
Forecast source: National Weather Service (api.weather.gov) for Marlborough (42.350, -71.547). Updated through the day.
Growing snapshot for Marlborough
Last spring frost
May 2
First fall frost
Oct 6
Growing season
156 days
Hardiness zone
6b
More local growing data for Marlborough: nearby ZIP 01752 weather · frost dates · planting calendar · Massachusetts frost dates
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Climate data from the nearest NOAA station, Maynard 2, Ma (7.7 mi from Marlborough). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.