Hornell, NY 14843 Frost Dates
14843, near Hornell, NY: the frost window
Around 05/11 is the usual last spring frost, about 256 days away. Fall's first freeze usually shows up around 10/08, roughly 150 days after the last spring frost.
Hornell sits in USDA Zone 5b (-15 to -10°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.
Stretching the season past the first frost
Hornell'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 Hornell's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/26 and only about 1 year in 10 sees frost after that.
Hornell against the rest of the dataset
Hornell's growing season runs about 150 days, ranking 35,265 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 1,568 of 1,951.
Learn more
Two guides worth reading on 14843: local microclimates, on what one yard in Hornell can differ from the 14843 normal, and zone vs. frost date, on why Zone 5b and Hornell's frost date answer different questions.