Corydon, KY 42406 Frost Dates
Frost dates for Corydon, KY, ZIP 42406
The last spring frost here typically falls around 04/04, about 219 days from today. The first fall frost typically arrives around 10/29, about 207 frost-free days later.
The USDA Plant Hardiness Zone Map puts Corydon in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7a around Corydon 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.
The actual range around Corydon's last frost
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/22 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Corydon compares
About 207 days separate Corydon's last and first frost, putting it 15,860 of 40,283 ZIP codes nationally. Within KY, it ranks 176 of 909.
Learn more
zone vs. frost date explains why Zone 7a and Corydon's frost date answer different questions, and the frost range explains how to read the range around Corydon's dates instead of trusting one.