St. Henry, OH 45826 Frost Dates
When can you plant in St. Henry, OH?
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/19, about 175 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for St. Henry, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in St. Henry before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Henry compares
St. Henry's growing season runs about 175 days, ranking 26,951 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 1,027 of 1,383.
Learn more
the frost range covers how to read the range around St. Henry's dates instead of trusting one. local microclimates covers what one yard in St. Henry can differ from the 45826 normal.