Last frost date in Dover, New Hampshire
May 3
Average last frost in spring. In an early year (1 in 10) it's over by April 23; in a late year (1 in 10) it comes after May 16.
October 10
Average first frost in fall. 1 year in 10 it comes by September 27.
Source: NOAA U.S. Climate Normals 1991–2020, station Durham 2 N (USW00054794), 2.4 miles from Dover, elevation 119 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 23 | May 3 | May 16 |
| First frost in fall | Sept 27 | Oct 10 | Oct 25 |
Frost-free days in an average year: 158
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 15 | Sept 29 |
| Frost (32°F) | Every year | May 3 | Oct 10 |
| Hard freeze (28°F) | Every year | Apr 20 | Oct 23 |
Nights at 32°F or colder in an average year: 150
What to plant now in Dover
- Spring planting calendar for an average last frost around April 30 Dover: May 3
- Fall planting calendar for an average first frost around October 10 Dover: October 10
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 New Hampshire
- Rochester 9 mi · last frost Apr 30
- Portsmouth 10 mi · last frost May 4
- Manchester 32 mi · last frost Apr 30
- Concord 34 mi · last frost May 8
- Laconia 40 mi · last frost Apr 30
Updated