Southbridge Town, MA 01550 Frost Dates
Frost dates for Southbridge Town, MA, ZIP 01550
Around 04/25 is the usual last spring frost, about 240 days away. The first fall frost typically arrives around 10/13, about 168 frost-free days later.
The USDA Plant Hardiness Zone Map puts Southbridge Town in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Southbridge Town has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Southbridge Town compares
About 168 days separate Southbridge Town's last and first frost, putting it 29,679 of 40,283 ZIP codes nationally. Within MA, it ranks 380 of 712.
Learn more
the frost range explains how to read the range around Southbridge Town's dates instead of trusting one, and local microclimates explains what one yard in Southbridge Town can differ from the 01550 normal.