Port Chester, NY 10573 Frost Dates
10573, near Port Chester, NY: the frost window
Around 04/12 is the usual last spring frost, about 227 days away. Fall's first freeze usually shows up around 10/31, roughly 200 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Port Chester in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Port Chester's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/12 isn't a guarantee
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Port Chester against the rest of the dataset
About 200 days separate Port Chester's last and first frost, putting it 17,719 of 40,283 ZIP codes nationally. Within NY, it ranks 317 of 1,951.
Learn more
Two guides worth reading on 10573: the frost range, on how to read the range around Port Chester's dates instead of trusting one, and local microclimates, on what one yard in Port Chester can differ from the 10573 normal.