Jackson, KY 41339 Frost Dates
41339, near Jackson, KY: the frost window
Typically, the last spring freeze lands around 04/19, roughly 234 days out. Fall's first freeze usually shows up around 10/24, roughly 187 days after the last spring frost.
Jackson sits in USDA Zone 7a (0 to 5°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
Jackson'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
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Jackson against the rest of the dataset
About 187 days separate Jackson's last and first frost, putting it 22,424 of 40,283 ZIP codes nationally. Within KY, it ranks 667 of 909.
Learn more
Two guides worth reading on 41339: local microclimates, on what one yard in Jackson can differ from the 41339 normal, and zone vs. frost date, on why Zone 7a and Jackson's frost date answer different questions.