New London, CT 06375 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.
The USDA Plant Hardiness Zone Map puts New London 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 New London's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/08 isn't a guarantee
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
About 207 days separate New London's last and first frost, putting it 15,791 of 40,283 ZIP codes nationally. Within CT, it ranks 27 of 391.
Learn more
Before leaning on 06375'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 06375 normal.