Last frost date in Waltham, Massachusetts
April 28
Average last frost in spring. In an early year (1 in 10) it's over by April 13; in a late year (1 in 10) it comes after May 12.
October 10
Average first frost in fall. 1 year in 10 it comes by September 28.
Source: NOAA U.S. Climate Normals 1991–2020, station Bedford Hanscom Fld (USW00014702), 6.1 miles from Waltham, elevation 133 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 13 | Apr 28 | May 12 |
| First frost in fall | Sept 28 | Oct 10 | Oct 28 |
Frost-free days in an average year: 165
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 10 | Oct 1 |
| Frost (32°F) | Every year | Apr 28 | Oct 10 |
| Hard freeze (28°F) | Every year | Apr 12 | Oct 25 |
Nights at 32°F or colder in an average year: 139
What to plant now in Waltham
- Spring planting calendar for an average last frost around April 30 Waltham: April 28
- Fall planting calendar for an average first frost around October 10 Waltham: 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 Massachusetts
- Cambridge 6 mi · last frost Apr 19
- Woburn 8 mi · last frost Apr 25
- Framingham 11 mi · last frost Apr 26
- Boston 12 mi · last frost Apr 4
- Quincy 15 mi · last frost Apr 25
Updated