Stonington, CT 06372 Frost Dates
Frost dates for Stonington, CT, ZIP 06372
Typically, the last spring freeze lands around 04/08, roughly 223 days out. The first fall frost typically arrives around 11/02, about 207 frost-free days later.
The USDA Plant Hardiness Zone Map puts Stonington 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 Stonington has about 9 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.
The actual range around Stonington's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Stonington compares
About 207 days separate Stonington's last and first frost, putting it 15,849 of 40,283 ZIP codes nationally. Within CT, it ranks 29 of 391.
Learn more
local microclimates explains what one yard in Stonington can differ from the 06372 normal, and zone vs. frost date explains why Zone 7a and Stonington's frost date answer different questions.