South Dakota frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Fairburn | May 15 | Sep 29 | 137 d | 5a |
| Fairfax | May 3 | Oct 10 | 160 d | 5a |
| Fairview | May 2 | Oct 2 | 153 d | 5a |
| Faith | May 6 | Oct 5 | 152 d | 4b |
| Faulkton | May 10 | Sep 28 | 141 d | 4b |
| Fedora | May 5 | Oct 2 | 150 d | 5a |
| Ferney | May 6 | Oct 4 | 151 d | 4a |
| Flandreau | May 5 | Oct 1 | 149 d | 4b |
| Florence | May 7 | Sep 28 | 144 d | 4b |
| Fort Meade | May 8 | Oct 3 | 148 d | 5a |
| Fort Pierre | May 6 | Oct 3 | 150 d | 4b |
| Fort Thompson | May 6 | Oct 5 | 152 d | 4b |
| Frankfort | May 8 | Oct 1 | 146 d | 4b |
| Frederick | May 4 | Oct 2 | 151 d | 4b |
| Freeman | May 1 | Oct 4 | 156 d | 5a |
| Fulton | May 2 | Oct 6 | 157 d | 5a |