Minnesota frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Fairfax | Apr 30 | Oct 4 | 157 d | 4b |
| Fairmont | Apr 25 | Oct 14 | 172 d | 5a |
| Faribault | May 5 | Oct 5 | 153 d | 4b |
| Farmington | Apr 27 | Oct 10 | 166 d | 5a |
| Farwell | May 11 | Sep 27 | 139 d | 4b |
| Federal Dam | May 8 | Oct 1 | 146 d | 3b |
| Felton | May 9 | Oct 1 | 145 d | 4a |
| Fergus Falls | May 4 | Oct 5 | 154 d | 4a |
| Fertile | May 11 | Sep 27 | 139 d | 4a |
| Fifty Lakes | May 6 | Oct 7 | 154 d | 4a |
| Finland | May 15 | Oct 1 | 139 d | 4a |
| Finlayson | May 13 | Sep 29 | 139 d | 4a |
| Fisher | May 11 | Sep 27 | 139 d | 4a |
| Flensburg | May 4 | Oct 5 | 154 d | 4a |
| Flom | May 7 | Sep 28 | 144 d | 4a |
| Floodwood | May 29 | Sep 18 | 112 d | 4a |
| Foley | May 7 | Sep 30 | 146 d | 4a |
| Forbes | Jun 5 | Sep 8 | 95 d | 3b |
| Forest Lake | May 3 | Oct 5 | 155 d | 4b |
| Foreston | May 8 | Oct 1 | 146 d | 4a |
| Fort Ripley | May 8 | Sep 29 | 144 d | 4a |
| Fosston | May 15 | Sep 26 | 134 d | 3b |
| Fountain | May 14 | Sep 28 | 137 d | 4b |
| Foxhome | May 4 | Oct 5 | 154 d | 4a |
| Franklin | Apr 30 | Oct 4 | 157 d | 4b |
| Frazee | May 4 | Oct 3 | 152 d | 4a |
| Freeborn | Apr 30 | Oct 6 | 159 d | 5a |
| Freeport | May 4 | Oct 1 | 150 d | 4b |
| Frontenac | Apr 23 | Oct 14 | 174 d | 4b |
| Frost | Apr 30 | Oct 6 | 159 d | 5a |
| Fulda | May 3 | Oct 4 | 154 d | 5a |