Bethesda, OH 43719 Frost Dates
Bethesda, OH: when does the frost end?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. Fall's first freeze usually shows up around 10/29, roughly 192 days after the last spring frost.
Bethesda 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
With roughly 9 weeks until Bethesda's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Bethesda against the rest of the dataset
At roughly 192 frost-free days, Bethesda places 20,457 of 40,283 ZIP codes in this dataset. Within OH, it ranks 256 of 1,383.
Learn more
Before leaning on 43719's figures: local microclimates explains what one yard in Bethesda can differ from the 43719 normal, while zone vs. frost date explains why Zone 6b and Bethesda's frost date answer different questions.