Harlan, KY 40829 Frost Dates
40829, near Harlan, KY: the frost window
Typically, the last spring freeze lands around 04/15, roughly 230 days out. Fall's first freeze usually shows up around 10/30, roughly 197 days after the last spring frost.
Harlan 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
Harlan's growing season runs out in roughly 9 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 Harlan's last frost
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 05/01 and only about 1 year in 10 sees frost after that.
Harlan against the rest of the dataset
Harlan's growing season runs about 197 days, ranking 18,709 of 40,283 US ZIP codes measured here, longest to shortest. Within KY, it ranks 312 of 909.
Learn more
Two guides worth reading on 40829: zone vs. frost date, on why Zone 7a and Harlan's frost date answer different questions, and the frost range, on how to read the range around Harlan's dates instead of trusting one.