Maineville, OH 45039 Frost Dates
When can you plant in Maineville, OH?
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/18, about 178 frost-free days later.
Maineville 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 7 weeks of growing season left in Maineville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Maineville's last frost
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 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 Maineville compares
Maineville's growing season runs about 178 days, ranking 25,776 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 864 of 1,383.
Learn more
local microclimates covers what one yard in Maineville can differ from the 45039 normal. zone vs. frost date covers why Zone 6b and Maineville's frost date answer different questions.