New Haven, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Haven, a city in New Haven County, Connecticut.
Today
73°F
Sunny
Sunny. High near 73, with temperatures falling to around 65 in the afternoon. South wind 3 to 9 mph.
7-day forecast for New Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 3 to 9 mph S | 0% |
| Tonight | 56°F | Partly Cloudy | 3 mph S | 0% |
| Thursday | 71°F | Mostly Cloudy | 5 to 12 mph S | 10% |
| Thursday Night | 62°F | Rain Showers Likely | 3 to 8 mph S | 66% |
| Friday | 69°F | Rain Showers | 2 to 6 mph S | 92% |
| Friday Night | 54°F | Showers And Thunderstorms | 3 mph SW | 81% |
| Saturday | 65°F | Slight Chance Rain Showers | 2 to 9 mph NW | 16% |
| Saturday Night | 44°F | Slight Chance Light Rain | 6 to 9 mph W | 24% |
| Sunday | 59°F | Slight Chance Light Rain then Mostly Sunny | 10 mph W | 20% |
| Sunday Night | 39°F | Partly Cloudy | 6 to 9 mph W | 4% |
| Monday | 57°F | Sunny | 9 to 15 mph W | 13% |
| Monday Night | 38°F | Mostly Clear | 5 to 9 mph W | 13% |
| Tuesday | 60°F | Sunny | 9 to 14 mph W | 6% |
| Tuesday Night | 39°F | Mostly Clear | 8 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov) for New Haven (41.311, -72.925). Updated through the day.
Growing snapshot for New Haven
Last spring frost
Apr 17
First fall frost
Oct 27
Growing season
193 days
Hardiness zone
7a
More local growing data for New Haven: nearby ZIP 06510 weather · frost dates · planting calendar · Connecticut frost dates
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Climate data from the nearest NOAA station, New Haven Tweed Ap, Ct (3.6 mi from New Haven). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.