North Haven, CT Weather & Growing Conditions
This Afternoon
71°F
Mostly Sunny
Mostly sunny. High near 71, with temperatures falling to around 68 in the afternoon. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 52°F | Partly Cloudy | 5 mph SE | 1% |
| Sunday | 67°F | Rain | 2 to 8 mph E | 95% |
| Sunday Night | 53°F | Rain | 5 to 10 mph NE | 95% |
| Monday | 68°F | Slight Chance Light Rain then Partly Sunny | 8 to 14 mph N | 24% |
| Monday Night | 48°F | Mostly Cloudy | 3 to 10 mph NE | 6% |
| Tuesday | 64°F | Mostly Cloudy | 13 mph NE | 14% |
| Tuesday Night | 47°F | Mostly Cloudy | 9 to 14 mph NE | 10% |
| Wednesday | 66°F | Partly Sunny | 17 mph NE | 6% |
| Wednesday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 13 to 16 mph NE | 26% |
| Thursday | 64°F | Chance Rain Showers | 20 mph NE | 31% |
| Thursday Night | 48°F | Chance Rain Showers | 14 to 18 mph N | 37% |
| Friday | 65°F | Chance Rain Showers | 18 mph N | 33% |
| Friday Night | 48°F | Chance Rain Showers | 14 to 17 mph N | 34% |
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 Sep 19, 2026.