Cincinnati, OH 45206 Frost Dates
Frost dates for Cincinnati, OH, ZIP 45206
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 10/25, about 190 frost-free days later.
Cincinnati 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.
What to do before the first frost
Zone 6b around Cincinnati has about 8 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
04/16 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. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cincinnati compares
Cincinnati's growing season runs about 190 days, ranking 20,960 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 304 of 1,383.
Learn more
the frost range explains how to read the range around Cincinnati's dates instead of trusting one, and local microclimates explains what one yard in Cincinnati can differ from the 45206 normal.