Coolville, OH 45742 Frost Dates
Frost dates for Coolville, OH, ZIP 45742
Typically, the last spring freeze lands around 04/14, roughly 229 days out. The first fall frost typically arrives around 10/30, about 197 frost-free days later.
The USDA Plant Hardiness Zone Map puts Coolville in Zone 6b (-5 to 0°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 6b around Coolville 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.
Why 04/14 isn't a guarantee
04/14 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. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Coolville compares
About 197 days separate Coolville's last and first frost, putting it 18,800 of 40,283 ZIP codes nationally. Within OH, it ranks 109 of 1,383.
Learn more
local microclimates explains what one yard in Coolville can differ from the 45742 normal, and zone vs. frost date explains why Zone 6b and Coolville's frost date answer different questions.