Ohio frost dates: A
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Aberdeen | Apr 18 | Oct 30 | 195 d | 6b |
| Ada | Apr 22 | Oct 22 | 183 d | 6a |
| Adamsville | Apr 26 | Oct 19 | 176 d | 6b |
| Addyston | Apr 13 | Oct 31 | 201 d | 6b |
| Adelphi | Apr 17 | Oct 28 | 194 d | 6b |
| Adena | Apr 21 | Oct 25 | 187 d | 6b |
| Akron | Apr 24 | Oct 28 | 187 d | 6b |
| Albany | Apr 27 | Oct 14 | 170 d | 6b |
| Alexandria | Apr 22 | Oct 18 | 179 d | 6a |
| Alger | Apr 22 | Oct 22 | 183 d | 6a |
| Alledonia | Apr 26 | Oct 21 | 178 d | 6b |
| Alliance | Apr 24 | Oct 26 | 185 d | 6a |
| Alpha | Apr 18 | Oct 25 | 190 d | 6b |
| Alvada | Apr 23 | Oct 23 | 183 d | 6b |
| Alvordton | Apr 28 | Oct 18 | 173 d | 6a |
| Amanda | Apr 22 | Oct 24 | 185 d | 6b |
| Amelia | Apr 23 | Oct 18 | 178 d | 6b |
| Amesville | Apr 25 | Oct 23 | 181 d | 6b |
| Amherst | Apr 24 | Oct 24 | 183 d | 6b |
| Amlin | Apr 22 | Oct 23 | 184 d | 6b |
| Amsterdam | Apr 21 | Oct 25 | 187 d | 6b |
| Andover | May 10 | Oct 10 | 153 d | 6a |
| Anna | Apr 27 | Oct 20 | 176 d | 6a |
| Ansonia | Apr 21 | Oct 20 | 182 d | 6a |
| Antwerp | Apr 27 | Oct 19 | 175 d | 6a |
| Apple Creek | Apr 24 | Oct 21 | 180 d | 6a |
| Arcadia | Apr 22 | Oct 24 | 185 d | 6b |
| Arcanum | Apr 21 | Oct 20 | 182 d | 6a |
| Archbold | Apr 29 | Oct 16 | 170 d | 6a |
| Arlington | Apr 19 | Oct 23 | 187 d | 6a |
| Ashland | Apr 30 | Oct 15 | 168 d | 6a |
| Ashley | Apr 24 | Oct 20 | 179 d | 6a |
| Ashtabula | May 2 | Oct 21 | 172 d | 6b |
| Ashville | Apr 17 | Oct 28 | 194 d | 6b |
| Athens | Apr 25 | Oct 23 | 181 d | 6b |
| Attica | Apr 23 | Oct 23 | 183 d | 6a |
| Atwater | Apr 21 | Oct 29 | 191 d | 6a |
| Augusta | May 2 | Oct 13 | 164 d | 6a |
| Aurora | Apr 21 | Oct 29 | 191 d | 6a |
| Austinburg | May 2 | Oct 21 | 172 d | 6a |
| Ava | Apr 30 | Oct 14 | 167 d | 6b |
| Avon | Apr 22 | Nov 1 | 193 d | 6b |
| Avon Lake | Apr 22 | Nov 1 | 193 d | 7a |