Adelphi, OH 45633 Frost Dates
Adelphi, OH: when does the frost end?
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/28, roughly 192 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Adelphi in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until Adelphi's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Adelphi against the rest of the dataset
At roughly 192 frost-free days, Adelphi places 20,555 of 40,283 ZIP codes in this dataset. Within OH, it ranks 274 of 1,383.
Learn more
Before leaning on 45633's figures: local microclimates explains what one yard in Adelphi can differ from the 45633 normal, while zone vs. frost date explains why Zone 6b and Adelphi's frost date answer different questions.