Harlan, KY 40806 Frost Dates
Frost dates for Harlan, KY, ZIP 40806
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/30, about 197 frost-free days later.
Zone 7a (0 to 5°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 Harlan, not a forecast for this year.
What to do before the first frost
Zone 7a around Harlan has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harlan compares
Harlan's growing season runs about 197 days, ranking 18,707 of 40,283 US ZIP codes measured here, longest to shortest. Within KY, it ranks 310 of 909.
Learn more
the frost range explains how to read the range around Harlan's dates instead of trusting one, and local microclimates explains what one yard in Harlan can differ from the 40806 normal.