Portville, NY 14721 Frost Dates
14721, near Portville, NY: the frost window
The last spring frost here typically falls around 05/07, about 252 days from today. Fall's first freeze usually shows up around 10/11, roughly 156 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Portville in Zone 5b (-15 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
Portville's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Portville's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Portville against the rest of the dataset
Portville's growing season runs about 156 days, ranking 33,741 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 1,334 of 1,951.
Learn more
Two guides worth reading on 14721: local microclimates, on what one yard in Portville can differ from the 14721 normal, and zone vs. frost date, on why Zone 5b and Portville's frost date answer different questions.