New Haven, CT 06501 Frost Dates
Frost dates for New Haven, CT, ZIP 06501
The last spring frost here typically falls around 04/17, about 232 days from today. 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
Zone 7a around New Haven has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/17 isn't a guarantee
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 19,684 of 40,283 ZIP codes nationally. Within CT, it ranks 60 of 391.
Learn more
zone vs. frost date explains why Zone 7a and New Haven's frost date answer different questions, and the frost range explains how to read the range around New Haven's dates instead of trusting one.