Harpster, OH 43323 Frost Dates
Harpster, OH: when does the frost end?
The last spring frost here typically falls around 04/29, about 244 days from today. Fall's first freeze usually shows up around 10/17, roughly 171 days after the last spring frost.
Harpster sits in USDA Zone 6a (-10 to -5°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 7 weeks until Harpster's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Harpster's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Harpster against the rest of the dataset
Harpster's growing season runs about 171 days, ranking 28,835 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 1,148 of 1,383.
Learn more
Before leaning on 43323's figures: local microclimates explains what one yard in Harpster can differ from the 43323 normal, while zone vs. frost date explains why Zone 6a and Harpster's frost date answer different questions.