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.

Tonight

53°F

Partly Cloudy

Partly cloudy, with a low around 53. North wind around 9 mph.

7-day forecast for New Haven

When	Temp	Forecast	Wind	Precip
Tonight	53°F	Partly Cloudy	9 mph N	0%
Saturday	69°F	Mostly Sunny	6 to 10 mph NE	0%
Saturday Night	56°F	Mostly Cloudy	2 to 6 mph SE	2%
Sunday	68°F	Showers And Thunderstorms	6 to 13 mph SE	88%
Sunday Night	56°F	Showers And Thunderstorms	2 to 13 mph SE	88%
Monday	67°F	Chance Rain Showers	9 to 14 mph NE	45%
Monday Night	51°F	Slight Chance Rain Showers	6 to 13 mph NE	23%
Tuesday	64°F	Slight Chance Rain Showers	15 mph NE	24%
Tuesday Night	49°F	Mostly Cloudy	12 to 15 mph NE	14%
Wednesday	64°F	Partly Sunny then Slight Chance Rain Showers	17 mph NE	15%
Wednesday Night	50°F	Chance Rain Showers	12 to 16 mph NE	25%
Thursday	63°F	Chance Rain Showers	18 mph NE	33%
Thursday Night	50°F	Chance Rain Showers	10 to 16 mph NE	34%
Friday	66°F	Chance Rain Showers	15 mph N	33%

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

More local growing data for New Haven: nearby ZIP 06510 weather · frost dates · planting calendar · Connecticut frost dates

Nearby towns & communities

Ansonia Branford Center Cheshire Village Derby East Haven Guilford Center Heritage Village Madison Center Meriden Milford city Naugatuck North Haven Northford Orange Quinnipiac University Wallingford Center Waterbury West Haven Woodmont

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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 Sep 19, 2026.