St. Bernard, OH 45274 Frost Dates
45274, near St. Bernard, OH: the frost window
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.
St. Bernard 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.
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
At roughly 193 frost-free days, St. Bernard places 19,910 of 40,283 ZIP codes in this dataset. Within OH, it ranks 197 of 1,383.
Learn more
Two guides worth reading on 45274: local microclimates, on what one yard in St. Bernard can differ from the 45274 normal, and zone vs. frost date, on why Zone 6b and St. Bernard's frost date answer different questions.