Harrisburg, OH 43117 Frost Dates
Frost dates for Harrisburg, OH, ZIP 43117
Around 04/17 is the usual last spring frost, about 232 days away. The first fall frost typically arrives around 10/28, about 192 frost-free days later.
Zone 6b (-5 to 0°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 Harrisburg, not a forecast for this year.
What to do before the first frost
Zone 6b around Harrisburg has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harrisburg compares
At roughly 192 frost-free days, Harrisburg places 20,553 of 40,283 ZIP codes in this dataset. Within OH, it ranks 272 of 1,383.
Learn more
the frost range explains how to read the range around Harrisburg's dates instead of trusting one, and local microclimates explains what one yard in Harrisburg can differ from the 43117 normal.