St. Bernard, OH 45298 Frost Dates
St. Bernard, OH: when does the frost end?
Typically, the last spring freeze lands around 04/16, roughly 231 days out. 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
With roughly 9 weeks until St. Bernard'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.
St. Bernard against the rest of the dataset
St. Bernard's growing season runs about 193 days, ranking 19,913 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 200 of 1,383.
Learn more
Before leaning on 45298's figures: local microclimates explains what one yard in St. Bernard can differ from the 45298 normal, while zone vs. frost date explains why Zone 6b and St. Bernard's frost date answer different questions.