Southbridge Town, MA 01508 Frost Dates
Southbridge Town, MA: when does the frost end?
Around 04/28 is the usual last spring frost, about 243 days away. Fall's first freeze usually shows up around 10/15, roughly 169 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Southbridge Town, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Southbridge Town's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/28 isn't a guarantee
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Southbridge Town against the rest of the dataset
Southbridge Town's growing season runs about 169 days, ranking 29,347 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 359 of 712.
Learn more
Before leaning on 01508's figures: local microclimates explains what one yard in Southbridge Town can differ from the 01508 normal, while zone vs. frost date explains why Zone 6a and Southbridge Town's frost date answer different questions.