Last frost date in Rochester, New Hampshire
April 30
Average last frost in spring. In an early year (1 in 10) it's over by April 18; in a late year (1 in 10) it comes after May 13.
October 9
Average first frost in fall. 1 year in 10 it comes by September 27.
Source: NOAA U.S. Climate Normals 1991–2020, station Rochester Skyhaven AP (USW00054791), 3.1 miles from Rochester, elevation 323 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Somersworth, so its frost dates are the same as Rochester's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 18 | Apr 30 | May 13 |
| First frost in fall | Sept 27 | Oct 9 | Oct 25 |
Frost-free days in an average year: 161
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 12 | Sept 30 |
| Frost (32°F) | Every year | Apr 30 | Oct 9 |
| Hard freeze (28°F) | Every year | Apr 17 | Oct 23 |
Nights at 32°F or colder in an average year: 145
What to plant now in Rochester
- Spring planting calendar for an average last frost around April 30 Rochester: April 30
- Fall planting calendar for an average first frost around October 10 Rochester: October 9
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
- Dover 9 mi · last frost May 3
- Portsmouth 19 mi · last frost May 4
- Concord 30 mi · last frost May 8
- Laconia 32 mi · last frost Apr 30
- Manchester 32 mi · last frost Apr 30
Updated