Port Jefferson, OH 45360 Frost Dates
Port Jefferson, OH: when does the frost end?
The last spring frost here typically falls around 04/27, about 242 days from today. Fall's first freeze usually shows up around 10/20, roughly 175 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Port Jefferson in Zone 6a (-10 to -5°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 8 weeks until Port Jefferson's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Port Jefferson against the rest of the dataset
Port Jefferson's growing season runs about 175 days, ranking 27,223 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 1,075 of 1,383.
Learn more
Before leaning on 45360's figures: the frost range explains how to read the range around Port Jefferson's dates instead of trusting one, while local microclimates explains what one yard in Port Jefferson can differ from the 45360 normal.