Mount Vernon, OH 43048 Frost Dates
Frost dates for Mount Vernon, OH, ZIP 43048
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/17, about 172 frost-free days later.
Mount Vernon sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6a around Mount Vernon 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 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Vernon compares
About 172 days separate Mount Vernon's last and first frost, putting it 28,205 of 40,283 ZIP codes nationally. Within OH, it ranks 1,108 of 1,383.
Learn more
the frost range explains how to read the range around Mount Vernon's dates instead of trusting one, and local microclimates explains what one yard in Mount Vernon can differ from the 43048 normal.