Last frost date in New Haven, Connecticut
April 17
Average last frost in spring. In an early year (1 in 10) it's over by April 2; in a late year (1 in 10) it comes after May 1.
October 27
Average first frost in fall. 1 year in 10 it comes by October 11.
Source: NOAA U.S. Climate Normals 1991–2020, station New Haven Tweed AP (USW00014758), 3.8 miles from New Haven, elevation 3 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for West Haven, so its frost dates are the same as New Haven's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 2 | Apr 17 | May 1 |
| First frost in fall | Oct 11 | Oct 27 | Nov 8 |
Frost-free days in an average year: 193
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 30 | Oct 15 |
| Frost (32°F) | Every year | Apr 17 | Oct 27 |
| Hard freeze (28°F) | Every year | Apr 4 | Nov 6 |
Nights at 32°F or colder in an average year: 102
What to plant now in New Haven
- Corn saladSept 15 – Nov 1Now
- Upland cressSept 15 – Nov 1Now
- Rhubarb plantsNov 1 – Dec 1Soon
- Asparagus plantsNov 15 – Jan 1Soon
- Spring planting calendar for an average last frost around April 20 New Haven: April 17
- Fall planting calendar for an average first frost around October 30 New Haven: October 27
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Connecticut
- Shelton 11 mi · last frost Apr 25
- Naugatuck 14 mi · last frost Apr 18
- Bridgeport 16 mi · last frost Apr 5
- Waterbury 18 mi · last frost Apr 26
- Bristol 26 mi · last frost Apr 25
Updated