Maine frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Fairfield | May 2 | Oct 10 | 161 d | 5a |
| Falmouth | Apr 26 | Oct 15 | 172 d | 6a |
| Farmingdale | May 1 | Oct 11 | 163 d | 5b |
| Farmington | May 16 | Sep 26 | 133 d | 5a |
| Farmington Falls | May 7 | Oct 2 | 148 d | 5a |
| Fort Fairfield | May 14 | Sep 26 | 135 d | 4a |
| Fort Kent | May 23 | Sep 24 | 124 d | 4b |
| Fort Kent Mills | May 23 | Sep 24 | 124 d | 4a |
| Frankfort | May 7 | Oct 5 | 151 d | 5a |
| Franklin | May 8 | Oct 9 | 154 d | 5b |
| Freedom | May 7 | Oct 5 | 151 d | 5a |
| Freeport | Apr 28 | Oct 19 | 174 d | 6a |
| Frenchboro | Apr 27 | Oct 22 | 178 d | 6b |
| Frenchville | May 6 | Oct 2 | 149 d | 4b |
| Friendship | Apr 27 | Oct 25 | 181 d | 6a |
| Fryeburg | May 17 | Sep 25 | 131 d | 5a |