Stonington, CT 02813 Frost Dates
Frost dates for Stonington, CT, ZIP 02813
Typically, the last spring freeze lands around 04/11, roughly 226 days out. The first fall frost typically arrives around 10/31, about 201 frost-free days later.
Stonington sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a 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
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 04/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Stonington compares
At roughly 201 frost-free days, Stonington places 17,587 of 40,283 ZIP codes in this dataset. Within CT, it ranks 36 of 391.
Learn more
the frost range explains how to read the range around Stonington's dates instead of trusting one, and local microclimates explains what one yard in Stonington can differ from the 02813 normal.