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
72°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny. High near 72, with temperatures falling to around 66 in the afternoon. Southwest wind 2 to 12 mph.
7-day forecast for New Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Fog then Sunny | 2 to 12 mph SW | 3% |
| Tonight | 56°F | Partly Cloudy | 6 mph SW | 2% |
| Thursday | 71°F | Chance Rain Showers | 3 to 12 mph S | 25% |
| Thursday Night | 60°F | Rain Showers | 3 to 8 mph SW | 83% |
| Friday | 68°F | Showers And Thunderstorms | 3 to 7 mph S | 87% |
| Friday Night | 55°F | Showers And Thunderstorms | 2 to 6 mph W | 87% |
| Saturday | 65°F | Rain Showers Likely | 6 to 9 mph NW | 59% |
| Saturday Night | 43°F | Slight Chance Rain Showers | 7 mph NW | 23% |
| Sunday | 61°F | Slight Chance Rain Showers then Mostly Sunny | 7 to 10 mph W | 20% |
| Sunday Night | 40°F | Partly Cloudy then Slight Chance Light Rain | 5 to 8 mph W | 15% |
| Monday | 59°F | Chance Light Rain | 8 to 15 mph NW | 26% |
| Monday Night | 39°F | Chance Light Rain | 8 to 12 mph W | 26% |
| Tuesday | 60°F | Slight Chance Light Rain then Mostly Sunny | 12 to 15 mph W | 22% |
| Tuesday Night | 39°F | Mostly Clear | 12 mph W | 5% |
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
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
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.