Stonington, CT 02894 Frost Dates
Stonington, CT: when does the frost end?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/12, roughly 163 days after the last spring frost.
Zone 6b (-5 to 0°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.
Stretching the season past the first frost
With roughly 6 weeks until Stonington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Stonington's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Stonington against the rest of the dataset
About 163 days separate Stonington's last and first frost, putting it 31,460 of 40,283 ZIP codes nationally. Within CT, it ranks 358 of 391.
Learn more
Before leaning on 02894's figures: local microclimates explains what one yard in Stonington can differ from the 02894 normal, while zone vs. frost date explains why Zone 6b and Stonington's frost date answer different questions.