Cincinnati, OH 45223 Frost Dates
Cincinnati, OH: when does the frost end?
Around 04/16 is the usual last spring frost, about 231 days away. Fall's first freeze usually shows up around 10/28, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cincinnati 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 Cincinnati's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/16 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 05/03 and only about 1 year in 10 sees frost after that.
Cincinnati against the rest of the dataset
At roughly 193 frost-free days, Cincinnati places 19,668 of 40,283 ZIP codes in this dataset. Within OH, it ranks 171 of 1,383.
Learn more
Before leaning on 45223's figures: the frost range explains how to read the range around Cincinnati's dates instead of trusting one, while local microclimates explains what one yard in Cincinnati can differ from the 45223 normal.