New London, CT 06385 Frost Dates
When can you plant in New London, CT?
The last spring frost here typically falls around 04/16, about 231 days from today. The first fall frost typically arrives around 10/28, about 194 frost-free days later.
Zone 7a (0 to 5°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 New London, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in New London before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around New London's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New London compares
At roughly 194 frost-free days, New London places 19,436 of 40,283 ZIP codes in this dataset. Within CT, it ranks 48 of 391.
Learn more
zone vs. frost date covers why Zone 7a and New London's frost date answer different questions. the frost range covers how to read the range around New London's dates instead of trusting one.