New London, CT 06357 Frost Dates
New London, CT: when does the frost end?
Typically, the last spring freeze lands around 04/16, roughly 231 days out. Fall's first freeze usually shows up around 10/28, roughly 194 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.
The actual range around New London's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
New London against the rest of the dataset
New London's growing season runs about 194 days, ranking 19,435 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 47 of 391.
Learn more
Before leaning on 06357's figures: the frost range explains how to read the range around New London's dates instead of trusting one, while local microclimates explains what one yard in New London can differ from the 06357 normal.