Marion, OH 43301 Frost Dates
Frost dates for Marion, OH, ZIP 43301
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/20, about 178 frost-free days later.
Marion 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 Marion has about 8 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 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marion compares
At roughly 178 frost-free days, Marion places 25,581 of 40,283 ZIP codes in this dataset. Within OH, it ranks 831 of 1,383.
Learn more
the frost range explains how to read the range around Marion's dates instead of trusting one, and local microclimates explains what one yard in Marion can differ from the 43301 normal.