Ohio frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Fairborn | Apr 24 | Oct 17 | 176 d | 6b |
| Fairfield | Apr 22 | Oct 18 | 179 d | 6b |
| Fairlawn | Apr 30 | Oct 21 | 174 d | 6b |
| Fairpoint | Apr 21 | Oct 25 | 187 d | 6b |
| Fairview | Apr 27 | Oct 22 | 178 d | 6b |
| Farmdale | Apr 30 | Oct 23 | 176 d | 6a |
| Farmer | Apr 26 | Oct 17 | 174 d | 6a |
| Farmersville | Apr 24 | Oct 19 | 178 d | 6b |
| Fayette | May 4 | Oct 7 | 156 d | 6a |
| Fayetteville | Apr 19 | Oct 22 | 186 d | 6b |
| Feesburg | Apr 11 | Oct 30 | 202 d | 6b |
| Felicity | Apr 16 | Oct 31 | 198 d | 6b |
| Findlay | Apr 22 | Oct 24 | 185 d | 6b |
| Flat Rock | Apr 25 | Oct 25 | 183 d | 6a |
| Fleming | Apr 24 | Oct 22 | 181 d | 6b |
| Fletcher | Apr 18 | Oct 23 | 188 d | 6a |
| Flushing | Apr 21 | Oct 25 | 187 d | 6b |
| Forest | Apr 22 | Oct 24 | 185 d | 6a |
| Fort Jennings | Apr 23 | Oct 22 | 182 d | 6a |
| Fort Loramie | Apr 27 | Oct 20 | 176 d | 6a |
| Fort Recovery | Apr 28 | Oct 15 | 170 d | 6a |
| Fostoria | Apr 23 | Oct 23 | 183 d | 6b |
| Fowler | May 1 | Oct 17 | 169 d | 6a |
| Frankfort | Apr 20 | Oct 22 | 185 d | 6b |
| Franklin | Apr 24 | Oct 19 | 178 d | 6b |
| Franklin Furnace | Apr 17 | Oct 25 | 191 d | 7a |
| Frazeysburg | Apr 29 | Oct 16 | 170 d | 6a |
| Fredericksburg | Apr 24 | Oct 21 | 180 d | 6a |
| Fredericktown | May 1 | Oct 10 | 162 d | 6a |
| Freeport | Apr 27 | Oct 22 | 178 d | 6b |
| Fremont | Apr 26 | Oct 23 | 180 d | 6b |
| Fresno | Apr 18 | Oct 28 | 193 d | 6b |
| Friendship | Apr 17 | Oct 25 | 191 d | 6b |
| Fulton | Apr 27 | Oct 17 | 173 d | 6a |
| Fultonham | Apr 30 | Oct 17 | 170 d | 6a |