Lewisburg, KY 42339 Frost Dates
42339, near Lewisburg, KY: the frost window
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/20, roughly 187 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lewisburg in Zone 7a (0 to 5°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
Lewisburg's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/03 and only about 1 year in 10 sees frost after that.
Lewisburg against the rest of the dataset
About 187 days separate Lewisburg's last and first frost, putting it 22,512 of 40,283 ZIP codes nationally. Within KY, it ranks 675 of 909.
Learn more
Two guides worth reading on 42339: the frost range, on how to read the range around Lewisburg's dates instead of trusting one, and local microclimates, on what one yard in Lewisburg can differ from the 42339 normal.