Stonington, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stonington, a borough in New London County, Connecticut.
Tonight
53°F
Patchy Fog
Patchy fog after 11pm. Partly cloudy, with a low around 53. Southwest wind around 5 mph.
7-day forecast for Stonington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Patchy Fog | 5 mph SW | 3% |
| Wednesday | 69°F | Sunny | 5 to 12 mph SW | 4% |
| Wednesday Night | 57°F | Partly Cloudy | 7 mph SW | 2% |
| Thursday | 70°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 12 mph SW | 17% |
| Thursday Night | 61°F | Rain Showers | 9 mph SW | 82% |
| Friday | 67°F | Showers And Thunderstorms | 6 to 9 mph S | 93% |
| Friday Night | 58°F | Showers And Thunderstorms | 6 mph SW | 93% |
| Saturday | 64°F | Rain Showers Likely | 6 to 10 mph NW | 74% |
| Saturday Night | 46°F | Chance Rain Showers | 8 mph NW | 37% |
| Sunday | 60°F | Slight Chance Rain Showers then Mostly Sunny | 10 mph W | 20% |
| Sunday Night | 42°F | Partly Cloudy then Slight Chance Light Rain | 6 to 9 mph W | 16% |
| Monday | 59°F | Chance Light Rain | 9 to 15 mph NW | 30% |
| Monday Night | 41°F | Chance Light Rain | 13 mph W | 30% |
| Tuesday | 59°F | Chance Light Rain | 14 to 17 mph W | 28% |
Forecast source: National Weather Service (api.weather.gov) for Stonington (41.335, -71.899). Updated through the day.
Growing snapshot for Stonington
Last spring frost
Apr 11
First fall frost
Oct 31
Growing season
201 days
Hardiness zone
7a
More local growing data for Stonington: nearby ZIP 06378 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Baltic
Colchester
Conning Towers-Nautilus Park
Gales Ferry
Groton
Groton Long Point
Jewett City
Long Hill
Mashantucket
Mystic
New London
Niantic
Noank
Norwich
Old Mystic
Oxoboxo River
Pawcatuck
Poquonock Bridge
Waterford
Climate data from the nearest NOAA station, Westerly State Ap, Ri (6.1 mi from Stonington). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.