Last frost date in Cambridge, Massachusetts
April 19
Average last frost in spring. In an early year (1 in 10) it's over by April 6; in a late year (1 in 10) it comes after May 3.
October 23
Average first frost in fall. 1 year in 10 it comes by October 8.
Source: NOAA U.S. Climate Normals 1991–2020, station Jamaica Plain (USC00193890), 5 miles from Cambridge, elevation 95 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Newton and Watertown, so their frost dates are the same as Cambridge's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 6 | Apr 19 | May 3 |
| First frost in fall | Oct 8 | Oct 23 | Nov 5 |
Frost-free days in an average year: 185
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 2 | Oct 10 |
| Frost (32°F) | Every year | Apr 19 | Oct 23 |
| Hard freeze (28°F) | Every year | Apr 5 | Nov 3 |
Nights at 32°F or colder in an average year: 121
What to plant now in Cambridge
- Spring planting calendar for an average last frost around April 20 Cambridge: April 19
- Fall planting calendar for an average first frost around October 20 Cambridge: October 23
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 Massachusetts
Updated