Ohio Frost Dates & Growing Zones by City
Columbus is our only Ohio city with frost dates so far: typical (50%) last spring frost Apr 20, typical frost-free season 185 days.
On the 2023 USDA hardiness map, these cities fall in zones 6a and 6b.
Each city's dates come from the nearest NOAA station that passes our quality rules. The methodology explains how we pick it.
| City | Last frost (50%) | First frost (50%) | Season (days, 50%) | Zone 2023 | Confidence | Planting calendar |
|---|---|---|---|---|---|---|
| Columbus frost dates | Apr 20 | Oct 24 | 185 | 6a–6b | Medium | Columbus planting calendar |
Station match, data and rules: methodology. Long-term odds, not a forecast.