Adelphi, OH 45647 Frost Dates
Frost dates for Adelphi, OH, ZIP 45647
Around 04/20 is the usual last spring frost, about 235 days away. The first fall frost typically arrives around 10/22, about 184 frost-free days later.
Adelphi sits in USDA Zone 6b (-5 to 0°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 6b around Adelphi 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 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Adelphi compares
About 184 days separate Adelphi's last and first frost, putting it 23,642 of 40,283 ZIP codes nationally. Within OH, it ranks 670 of 1,383.
Learn more
the frost range explains how to read the range around Adelphi's dates instead of trusting one, and local microclimates explains what one yard in Adelphi can differ from the 45647 normal.