Last frost date in Marlborough, Massachusetts
May 2
Average last frost in spring. In an early year (1 in 10) it's over by April 22; in a late year (1 in 10) it comes after May 16.
October 6
Average first frost in fall. 1 year in 10 it comes by September 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Maynard 2 (USC00194580), 7.7 miles from Marlborough, elevation 205 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 22 | May 2 | May 16 |
| First frost in fall | Sept 25 | Oct 6 | Oct 22 |
Frost-free days in an average year: 156
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 13 | Sept 27 |
| Frost (32°F) | Every year | May 2 | Oct 6 |
| Hard freeze (28°F) | Every year | Apr 21 | Oct 18 |
Nights at 32°F or colder in an average year: 147
What to plant now in Marlborough
- Spring planting calendar for an average last frost around April 30 Marlborough: May 2
- Fall planting calendar for an average first frost around October 10 Marlborough: October 6
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
- Framingham 6 mi · last frost Apr 26
- Worcester 14 mi · last frost Apr 23
- Waltham 16 mi · last frost Apr 28
- Leominster 16 mi · last frost Apr 29
- Franklin Town 20 mi · last frost Apr 30