Winthrop Town, MA 02297 Frost Dates
Frost dates for Winthrop Town, MA, ZIP 02297
Around 04/04 is the usual last spring frost, about 219 days away. The first fall frost typically arrives around 11/09, about 218 frost-free days later.
The USDA Plant Hardiness Zone Map puts Winthrop Town in Zone 7a (0 to 5°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 7a around Winthrop Town has about 10 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 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Winthrop Town compares
Winthrop Town's growing season runs about 218 days, ranking 13,227 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 44 of 712.
Learn more
local microclimates explains what one yard in Winthrop Town can differ from the 02297 normal, and zone vs. frost date explains why Zone 7a and Winthrop Town's frost date answer different questions.