Southbridge Town, MA 01566 Frost Dates
Southbridge Town, MA: when does the frost end?
Typically, the last spring freeze lands around 04/28, roughly 243 days out. Fall's first freeze usually shows up around 10/15, roughly 169 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Southbridge Town in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
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.
The actual range around Southbridge Town's last frost
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
At roughly 169 frost-free days, Southbridge Town places 29,351 of 40,283 ZIP codes in this dataset. Within MA, it ranks 363 of 712.
Learn more
Before leaning on 01566's figures: local microclimates explains what one yard in Southbridge Town can differ from the 01566 normal, while zone vs. frost date explains why Zone 6a and Southbridge Town's frost date answer different questions.