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.
Today
78°F
Mostly Sunny
Mostly sunny, with a high near 78. West wind around 6 mph.
7-day forecast for New London
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Mostly Sunny | 6 mph W | 0% |
| Tonight | 65°F | Mostly Cloudy | 5 mph NE | 11% |
| Wednesday | 79°F | Mostly Sunny | 6 mph W | 8% |
| Wednesday Night | 70°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph S | 18% |
| Thursday | 82°F | Mostly Sunny | 5 to 12 mph SW | 13% |
| Thursday Night | 73°F | Mostly Clear | 6 to 10 mph SW | 12% |
| Friday | 83°F | Sunny | 6 to 10 mph SW | 11% |
| Friday Night | 72°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 19% |
| Saturday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 18% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms | 3 to 7 mph SW | 21% |
| Sunday | 84°F | Mostly Sunny | 3 to 9 mph W | 12% |
| Sunday Night | 71°F | Mostly Clear | 3 to 7 mph SW | 7% |
| Monday | 85°F | Sunny | 3 to 10 mph SW | 9% |
| Monday Night | 70°F | Partly Cloudy | 5 to 9 mph W | 11% |
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 Aug 4, 2026.