St. Charles, KY 42453 Frost Dates
Frost dates for St. Charles, KY, ZIP 42453
Typically, the last spring freeze lands around 04/02, roughly 217 days out. The first fall frost typically arrives around 11/01, about 212 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 St. Charles, not a forecast for this year.
What to do before the first frost
Zone 7a around St. Charles 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
04/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/17 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Charles compares
St. Charles's growing season runs about 212 days, ranking 14,679 of 40,283 US ZIP codes measured here, longest to shortest. Within KY, it ranks 100 of 909.
Learn more
zone vs. frost date explains why Zone 7a and St. Charles's frost date answer different questions, and the frost range explains how to read the range around St. Charles's dates instead of trusting one.