New Haven, CT 06725 Frost Dates
Frost dates for New Haven, CT, ZIP 06725
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 6b (-5 to 0°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 6b 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
New Haven's growing season runs about 193 days, ranking 19,720 of 40,283 US ZIP codes measured here, longest to shortest. Within CT, it ranks 96 of 391.
Learn more
the frost range explains how to read the range around New Haven's dates instead of trusting one, and local microclimates explains what one yard in New Haven can differ from the 06725 normal.