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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

WhenTempForecastWindPrecip
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.