New London, CT 06335 Frost Dates
New London, CT: when does the frost end?
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 11/02, roughly 207 days after the last spring frost.
New London 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.
Stretching the season past the first frost
With roughly 9 weeks until New London'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
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
New London against the rest of the dataset
At roughly 207 frost-free days, New London places 15,790 of 40,283 ZIP codes in this dataset. Within CT, it ranks 26 of 391.
Learn more
Before leaning on 06335's figures: local microclimates explains what one yard in New London can differ from the 06335 normal, while zone vs. frost date explains why Zone 7a and New London's frost date answer different questions.