Last frost date in Boston, Massachusetts
April 4
Average last frost in spring. In an early year (1 in 10) it's over by March 25; in a late year (1 in 10) it comes after April 17.
November 9
Average first frost in fall. 1 year in 10 it comes by October 29.
Source: NOAA U.S. Climate Normals 1991–2020, station Boston Logan International AP (USW00014739), 1.6 miles from Boston, elevation 12 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Chelsea, Everett, Malden, Medford, Revere, Somerville and Winthrop Town, so their frost dates are the same as Boston's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 25 | Apr 4 | Apr 17 |
| First frost in fall | Oct 29 | Nov 9 | Nov 22 |
Frost-free days in an average year: 218
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 17 | Oct 29 |
| Frost (32°F) | Every year | Apr 4 | Nov 9 |
| Hard freeze (28°F) | Every year | Mar 28 | Nov 21 |
Nights at 32°F or colder in an average year: 92
What to plant now in Boston
- Mustard greensAug 15 – Nov 1Now
- Garden peasSept 1 – Nov 1Now
- ParsleySept 1 – Nov 15Now
- RadishesSept 1 – Nov 15Now
- SpinachSept 15 – Nov 1Now
- Corn saladOct 1 – Dec 1Now
- Onion setsOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- Asparagus plantsDec 1 – Jan 1Soon
- Spring planting calendar for an average last frost around March 30 Boston: April 4
- Fall planting calendar for an average first frost around November 10 Boston: November 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 Massachusetts
- Quincy 5 mi · last frost Apr 25
- Cambridge 6 mi · last frost Apr 19
- Lynn 10 mi · last frost Apr 25
- Randolph Town 11 mi · last frost Apr 18
- Waltham 12 mi · last frost Apr 28