Last frost date in Waterbury, Connecticut
April 26
Average last frost in spring. In an early year (1 in 10) it's over by April 11; in a late year (1 in 10) it comes after May 9.
October 16
Average first frost in fall. 1 year in 10 it comes by October 4.
Source: NOAA U.S. Climate Normals 1991–2020, station Meriden Markham Muni AP (USW00054788), 11.3 miles from Waterbury, elevation 103 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Meriden and Middletown, so their frost dates are the same as Waterbury's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 11 | Apr 26 | May 9 |
| First frost in fall | Oct 4 | Oct 16 | Nov 1 |
Frost-free days in an average year: 175
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 7 | Oct 6 |
| Frost (32°F) | Every year | Apr 26 | Oct 16 |
| Hard freeze (28°F) | Every year | Apr 10 | Oct 30 |
Nights at 32°F or colder in an average year: 129
What to plant now in Waterbury
- Spring planting calendar for an average last frost around April 30 Waterbury: April 26
- Fall planting calendar for an average first frost around October 20 Waterbury: October 16
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
- Naugatuck 5 mi · last frost Apr 18
- Bristol 10 mi · last frost Apr 25
- New Haven 18 mi · last frost Apr 17
- Shelton 18 mi · last frost Apr 25
- Torrington 20 mi · last frost May 8