Boone, NC 28618 Frost Dates
28618, near Boone, NC: the frost window
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 10/13, roughly 163 days after the last spring frost.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Boone, not a forecast for this year.
Stretching the season past the first frost
Boone's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Boone against the rest of the dataset
Boone's growing season runs about 163 days, ranking 31,338 of 40,283 US ZIP codes measured here, longest to shortest. Within NC, it ranks 1,049 of 1,078.
Learn more
Two guides worth reading on 28618: local microclimates, on what one yard in Boone can differ from the 28618 normal, and zone vs. frost date, on why Zone 7b and Boone's frost date answer different questions.