New Haven, CT 06532 Frost Dates
When can you plant in New Haven, CT?
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/27, about 193 frost-free days later.
New Haven 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.
What to do before the first frost
About 9 weeks of growing season left in New Haven before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New Haven compares
About 193 days separate New Haven's last and first frost, putting it 19,705 of 40,283 ZIP codes nationally. Within CT, it ranks 81 of 391.
Learn more
zone vs. frost date covers why Zone 7a and New Haven's frost date answer different questions. the frost range covers how to read the range around New Haven's dates instead of trusting one.