Last frost date in Hartford, Connecticut
April 17
Average last frost in spring. In an early year (1 in 10) it's over by April 1; in a late year (1 in 10) it comes after May 1.
October 26
Average first frost in fall. 1 year in 10 it comes by October 12.
Source: NOAA U.S. Climate Normals 1991–2020, station Hartford Brainard Fld (USW00014752), 2.6 miles from Hartford, elevation 19 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for New Britain, so its frost dates are the same as Hartford's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 1 | Apr 17 | May 1 |
| First frost in fall | Oct 12 | Oct 26 | Nov 7 |
Frost-free days in an average year: 191
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 30 | Oct 14 |
| Frost (32°F) | Every year | Apr 17 | Oct 26 |
| Hard freeze (28°F) | Every year | Apr 3 | Nov 5 |
Nights at 32°F or colder in an average year: 121
What to plant now in Hartford
- 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 Hartford: April 17
- Fall planting calendar for an average first frost around October 30 Hartford: October 26
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
- Bristol 15 mi · last frost Apr 25
- Waterbury 23 mi · last frost Apr 26
- Torrington 24 mi · last frost May 8
- Naugatuck 27 mi · last frost Apr 18
- New Haven 34 mi · last frost Apr 17