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.
Overnight
57°F
Patchy Fog
Patchy fog before 5am. Partly cloudy, with a low around 57. Southwest wind around 6 mph.
7-day forecast for New London
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Patchy Fog | 6 mph SW | 3% |
| Wednesday | 68°F | Patchy Fog then Sunny | 6 to 13 mph SW | 4% |
| Wednesday Night | 60°F | Partly Cloudy | 9 mph SW | 2% |
| Thursday | 68°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 13 mph SW | 18% |
| Thursday Night | 63°F | Rain Showers | 12 mph SW | 83% |
| Friday | 66°F | Showers And Thunderstorms | 10 mph S | 93% |
| Friday Night | 57°F | Showers And Thunderstorms | 7 mph SW | 93% |
| Saturday | 64°F | Rain Showers Likely | 7 to 10 mph NW | 71% |
| Saturday Night | 45°F | Chance Rain Showers | 9 mph NW | 35% |
| 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 | 9 mph W | 16% |
| Monday | 59°F | Chance Light Rain | 9 to 16 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 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 Nov 4, 2026.