North Haven, CT Weather & Growing Conditions
This Afternoon
83°F
Mostly Sunny
Mostly sunny, with a high near 83. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Mostly Sunny | 5 mph S | 0% |
| Tonight | 63°F | Mostly Cloudy | 3 mph NW | 4% |
| Wednesday | 82°F | Partly Sunny | 5 mph SW | 8% |
| Wednesday Night | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph S | 24% |
| Thursday | 87°F | Chance Showers And Thunderstorms | 2 to 9 mph SW | 38% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 8 mph SW | 33% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 38% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 36% |
| Saturday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph SW | 37% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph W | 37% |
| Sunday | 87°F | Mostly Sunny | 1 to 7 mph W | 13% |
| Sunday Night | 70°F | Mostly Clear | 5 mph SW | 11% |
| Monday | 88°F | Sunny | 2 to 9 mph W | 14% |
| Monday Night | 68°F | Partly Cloudy | 3 to 8 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for North Haven, CT
Last spring frost
Apr 18
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
6b
Explore more for North Haven, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Mt Carmel, Ct (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.