Port Chester, NY 06830 Frost Dates
Frost dates for Port Chester, NY, ZIP 06830
Typically, the last spring freeze lands around 04/12, roughly 227 days out. The first fall frost typically arrives around 10/31, about 200 frost-free days later.
Port Chester 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 Port Chester 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 04/12 isn't a guarantee
04/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port Chester compares
Port Chester's growing season runs about 200 days, ranking 17,718 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 316 of 1,951.
Learn more
local microclimates explains what one yard in Port Chester can differ from the 06830 normal, and zone vs. frost date explains why Zone 7a and Port Chester's frost date answer different questions.