Stonington, CT 02891 Frost Dates
When can you plant in Stonington, CT?
The last spring frost here typically falls around 04/11, about 226 days from today. The first fall frost typically arrives around 10/31, about 201 frost-free days later.
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 Stonington, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Stonington before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/11 isn't a guarantee
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
About 201 days separate Stonington's last and first frost, putting it 17,591 of 40,283 ZIP codes nationally. Within CT, it ranks 40 of 391.
Learn more
the frost range covers how to read the range around Stonington's dates instead of trusting one. local microclimates covers what one yard in Stonington can differ from the 02891 normal.