Marlborough, MA 01775 Frost Dates
When can you plant in Marlborough, MA?
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/06, about 156 frost-free days later.
Marlborough sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 6 weeks of growing season left in Marlborough before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Marlborough's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marlborough compares
At roughly 156 frost-free days, Marlborough places 33,521 of 40,283 ZIP codes in this dataset. Within MA, it ranks 621 of 712.
Learn more
the frost range covers how to read the range around Marlborough's dates instead of trusting one. local microclimates covers what one yard in Marlborough can differ from the 01775 normal.