St. Bernard, OH 45201 Frost Dates
45201, near St. Bernard, OH: the frost window
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 St. Bernard 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
St. Bernard's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around St. Bernard's last frost
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.
St. Bernard against the rest of the dataset
About 193 days separate St. Bernard's last and first frost, putting it 19,892 of 40,283 ZIP codes nationally. Within OH, it ranks 179 of 1,383.
Learn more
Two guides worth reading on 45201: local microclimates, on what one yard in St. Bernard can differ from the 45201 normal, and zone vs. frost date, on why Zone 6b and St. Bernard's frost date answer different questions.