New London, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New London, a city in New London County, Connecticut.
This Afternoon
77°F
Sunny
Sunny. High near 77, with temperatures falling to around 75 in the afternoon. Northwest wind around 7 mph.
7-day forecast for New London
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Sunny | 7 mph NW | 0% |
| Tonight | 55°F | Partly Cloudy | 7 to 13 mph N | 0% |
| Saturday | 66°F | Mostly Sunny | 6 to 10 mph E | 0% |
| Saturday Night | 58°F | Mostly Cloudy | 7 mph SE | 0% |
| Sunday | 66°F | Showers And Thunderstorms | 8 to 13 mph SE | 80% |
| Sunday Night | 61°F | Showers And Thunderstorms | 9 to 14 mph E | 90% |
| Monday | 65°F | Rain Showers Likely | 12 to 17 mph NE | 61% |
| Monday Night | 53°F | Slight Chance Rain Showers | 9 to 14 mph NE | 24% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 to 18 mph NE | 21% |
| Tuesday Night | 52°F | Mostly Cloudy | 15 to 18 mph NE | 11% |
| Wednesday | 64°F | Partly Sunny then Slight Chance Rain Showers | 18 to 22 mph NE | 15% |
| Wednesday Night | 53°F | Chance Rain Showers | 16 to 20 mph NE | 25% |
| Thursday | 63°F | Chance Rain Showers | 18 to 22 mph NE | 32% |
| Thursday Night | 53°F | Chance Rain Showers | 13 to 17 mph NE | 37% |
Forecast source: National Weather Service (api.weather.gov) for New London (41.333, -72.096). Updated through the day.
Growing snapshot for New London
Last spring frost
Apr 16
First fall frost
Oct 28
Growing season
194 days
Hardiness zone
7a
More local growing data for New London: nearby ZIP 06320 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
Niantic
Noank
Norwich
Old Mystic
Oxoboxo River
Pawcatuck
Poquonock Bridge
Stonington
Waterford
Climate data from the nearest NOAA station, Groton New London Ap, Ct (3.1 mi from New London). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.