Stonington, CT 06379 Frost Dates
Stonington, CT: when does the frost end?
The last spring frost here typically falls around 04/11, about 226 days from today. Fall's first freeze usually shows up around 10/31, roughly 201 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 9 weeks until Stonington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Stonington against the rest of the dataset
At roughly 201 frost-free days, Stonington places 17,594 of 40,283 ZIP codes in this dataset. Within CT, it ranks 43 of 391.
Learn more
Before leaning on 06379's figures: local microclimates explains what one yard in Stonington can differ from the 06379 normal, while zone vs. frost date explains why Zone 7a and Stonington's frost date answer different questions.