Union City, OH 45390 Frost Dates
Union City, 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 10/20, roughly 180 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Union City 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 Union City'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 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Union City against the rest of the dataset
At roughly 180 frost-free days, Union City places 24,912 of 40,283 ZIP codes in this dataset. Within OH, it ranks 790 of 1,383.
Learn more
Before leaning on 45390's figures: local microclimates explains what one yard in Union City can differ from the 45390 normal, while zone vs. frost date explains why Zone 6a and Union City's frost date answer different questions.