Oak Harbor, OH 43449 Frost Dates
Oak Harbor, OH: when does the frost end?
Around 04/21 is the usual last spring frost, about 236 days away. Fall's first freeze usually shows up around 10/24, roughly 183 days after the last spring frost.
Oak Harbor 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 8 weeks until Oak Harbor's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 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.
Oak Harbor against the rest of the dataset
About 183 days separate Oak Harbor's last and first frost, putting it 23,868 of 40,283 ZIP codes nationally. Within OH, it ranks 700 of 1,383.
Learn more
Before leaning on 43449's figures: the frost range explains how to read the range around Oak Harbor's dates instead of trusting one, while local microclimates explains what one yard in Oak Harbor can differ from the 43449 normal.