New Haven, CT Weather & Growing Conditions
Today
71°F
Mostly Sunny
Mostly sunny. High near 71, with temperatures falling to around 67 in the afternoon. East wind 5 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Mostly Sunny | 5 to 9 mph E | 0% |
| Tonight | 53°F | Partly Cloudy | 6 mph SE | 1% |
| Sunday | 68°F | Rain | 5 to 9 mph SE | 94% |
| Sunday Night | 53°F | Rain | 6 to 10 mph E | 94% |
| Monday | 68°F | Chance Light Rain then Partly Sunny | 8 to 14 mph N | 28% |
| Monday Night | 49°F | Mostly Cloudy | 5 to 10 mph NE | 9% |
| Tuesday | 64°F | Slight Chance Rain Showers | 13 mph NE | 18% |
| Tuesday Night | 48°F | Mostly Cloudy | 10 to 14 mph NE | 13% |
| Wednesday | 66°F | Partly Sunny | 17 mph NE | 7% |
| Wednesday Night | 48°F | Chance Rain Showers | 16 mph NE | 27% |
| 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 | 16 to 20 mph N | 33% |
| Friday Night | 49°F | Chance Rain Showers | 15 to 18 mph N | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Haven, CT
Last spring frost
Apr 17
First fall frost
Oct 27
Growing season
193 days
Hardiness zone
7a
Explore more for New Haven, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, New Haven Tweed Ap, Ct (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.