Dayton, OH 45414 Frost Dates
When can you plant in Dayton, OH?
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/28, about 194 frost-free days later.
Dayton 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
About 9 weeks of growing season left in Dayton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Dayton's last frost
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 Dayton compares
At roughly 194 frost-free days, Dayton places 19,409 of 40,283 ZIP codes in this dataset. Within OH, it ranks 148 of 1,383.
Learn more
the frost range covers how to read the range around Dayton's dates instead of trusting one. local microclimates covers what one yard in Dayton can differ from the 45414 normal.