New Haven, CT Weather & Growing Conditions
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 5 mph SW | 0% |
| Tonight | 64°F | Mostly Cloudy | 3 mph S | 4% |
| Wednesday | 83°F | Partly Sunny | 5 mph SW | 7% |
| Wednesday Night | 70°F | Mostly Cloudy then Chance Rain Showers | 3 mph S | 25% |
| Thursday | 87°F | Chance Showers And Thunderstorms | 2 to 9 mph S | 30% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 8 mph SW | 27% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 33% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 32% |
| Saturday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph SW | 35% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 1 to 5 mph W | 35% |
| Sunday | 88°F | Mostly Sunny | 2 to 7 mph W | 13% |
| Sunday Night | 71°F | Mostly Clear | 2 to 6 mph SW | 10% |
| Monday | 89°F | Sunny | 2 to 9 mph W | 12% |
| Monday Night | 70°F | Partly Cloudy | 2 to 8 mph W | 14% |
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 (3.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.