Oklahoma frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Fairfax | Apr 11 | Oct 24 | 196 d | 7a |
| Fairland | Apr 6 | Oct 27 | 204 d | 7a |
| Fairmont | Apr 10 | Oct 29 | 202 d | 7a |
| Fairview | Apr 5 | Nov 1 | 210 d | 7a |
| Fanshawe | Apr 6 | Nov 2 | 210 d | 7b |
| Fargo | Apr 17 | Oct 20 | 186 d | 7a |
| Faxon | Apr 7 | Nov 2 | 209 d | 7b |
| Fay | Apr 6 | Nov 3 | 211 d | 7b |
| Felt | Apr 26 | Oct 17 | 174 d | 6b |
| Finley | Apr 3 | Nov 1 | 212 d | 8a |
| Fittstown | Mar 29 | Nov 6 | 222 d | 7b |
| Fitzhugh | Mar 29 | Nov 6 | 222 d | 7b |
| Fletcher | Apr 4 | Oct 31 | 210 d | 7b |
| Forgan | Apr 21 | Oct 21 | 183 d | 6b |
| Fort Cobb | Apr 5 | Nov 3 | 212 d | 7b |
| Fort Gibson | Apr 7 | Oct 30 | 206 d | 7b |
| Fort Sill | Mar 26 | Nov 7 | 226 d | 8a |
| Fort Supply | Apr 21 | Oct 19 | 181 d | 7a |
| Fort Towson | Mar 15 | Nov 15 | 245 d | 8a |
| Foss | Apr 3 | Nov 1 | 212 d | 7b |
| Foster | Apr 13 | Oct 27 | 197 d | 7b |
| Fox | Apr 6 | Nov 1 | 209 d | 8a |
| Foyil | Apr 7 | Oct 30 | 206 d | 7a |
| Francis | Mar 31 | Nov 3 | 217 d | 7b |
| Frederick | Apr 3 | Nov 4 | 215 d | 8a |
| Freedom | Apr 19 | Oct 17 | 181 d | 7a |