Smithville, OH 44677 Frost Dates
Frost dates for Smithville, OH, ZIP 44677
Typically, the last spring freeze lands around 04/29, roughly 244 days out. The first fall frost typically arrives around 10/14, about 167 frost-free days later.
The USDA Plant Hardiness Zone Map puts Smithville in Zone 6a (-10 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 6a around Smithville has about 7 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 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Smithville compares
About 167 days separate Smithville's last and first frost, putting it 30,064 of 40,283 ZIP codes nationally. Within OH, it ranks 1,292 of 1,383.
Learn more
local microclimates explains what one yard in Smithville can differ from the 44677 normal, and zone vs. frost date explains why Zone 6a and Smithville's frost date answer different questions.