Stonington, CT 02833 Frost Dates
When can you plant in Stonington, CT?
Around 04/11 is the usual last spring frost, about 226 days away. The first fall frost typically arrives around 10/31, about 201 frost-free days later.
Stonington sits in USDA Zone 6b (-5 to 0°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
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.
How much risk comes with planting early here
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 17,588 of 40,283 ZIP codes in this dataset. Within CT, it ranks 37 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 02833 normal.