Groton, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Groton, a community in Middlesex County, Massachusetts.
Today
66°F
Mostly Sunny
Mostly sunny, with a high near 66. East wind around 2 mph.
7-day forecast for Groton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Mostly Sunny | 2 mph E | 0% |
| Tonight | 44°F | Partly Cloudy | 2 mph S | 0% |
| Sunday | 60°F | Mostly Cloudy then Chance Rain Showers | 0 to 5 mph SE | 87% |
| Sunday Night | 47°F | Rain Showers | 2 to 6 mph NE | 83% |
| Monday | 66°F | Partly Sunny | 7 mph N | 9% |
| Monday Night | 43°F | Mostly Cloudy | 1 to 5 mph N | 0% |
| Tuesday | 61°F | Partly Sunny | 7 mph NE | 1% |
| Tuesday Night | 42°F | Mostly Cloudy | 1 to 6 mph NE | 1% |
| Wednesday | 62°F | Partly Sunny | 6 to 10 mph NE | 2% |
| Wednesday Night | 42°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 8 mph NE | 18% |
| Thursday | 60°F | Chance Rain Showers | 9 mph NE | 32% |
| Thursday Night | 43°F | Chance Rain Showers | 6 to 10 mph N | 34% |
| Friday | 62°F | Chance Rain Showers | 10 mph N | 34% |
| Friday Night | 44°F | Chance Rain Showers | 7 to 10 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Groton (42.612, -71.565). Updated through the day.
Growing snapshot for Groton
Last spring frost
Apr 29
First fall frost
Oct 8
Growing season
162 days
Hardiness zone
6a
More local growing data for Groton: nearby ZIP 01450 weather · frost dates · planting calendar · Massachusetts frost dates
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Climate data from the nearest NOAA station, Nashua Cwsu, Nh (9.5 mi from Groton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.