Last frost date in Somerville, New Jersey
April 30
Average last frost in spring. In an early year (1 in 10) it's over by April 15; in a late year (1 in 10) it comes after May 14.
October 20
Average first frost in fall. 1 year in 10 it comes by October 5.
Source: NOAA U.S. Climate Normals 1991–2020, station Somerville 4 NW (USC00288194), 3.9 miles from Somerville, elevation 134 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Bound Brook and Manville, so their frost dates are the same as Somerville's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 15 | Apr 30 | May 14 |
| First frost in fall | Oct 5 | Oct 20 | Nov 3 |
Frost-free days in an average year: 172
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 10 | Oct 9 |
| Frost (32°F) | Every year | Apr 30 | Oct 20 |
| Hard freeze (28°F) | Every year | Apr 15 | Oct 31 |
Nights at 32°F or colder in an average year: 137
What to plant now in Somerville
- Spring planting calendar for an average last frost around April 30 Somerville: April 30
- Fall planting calendar for an average first frost around October 20 Somerville: October 20
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 Jersey
- New Brunswick 10 mi · last frost Apr 15
- Plainfield 11 mi · last frost Apr 11
- Princeton 15 mi · last frost Apr 25
- Westfield 15 mi · last frost Apr 11
- Summit 16 mi · last frost Apr 18