Winthrop Town, MA 02283 Frost Dates
02283, near Winthrop Town, MA: the frost window
Typically, the last spring freeze lands around 04/04, roughly 219 days out. Fall's first freeze usually shows up around 11/09, roughly 218 days after the last spring frost.
Zone 7a (0 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 Winthrop Town, not a forecast for this year.
Stretching the season past the first frost
Winthrop Town's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Winthrop Town against the rest of the dataset
Winthrop Town's growing season runs about 218 days, ranking 13,224 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 41 of 712.
Learn more
Two guides worth reading on 02283: zone vs. frost date, on why Zone 7a and Winthrop Town's frost date answer different questions, and the frost range, on how to read the range around Winthrop Town's dates instead of trusting one.