Pennsylvania frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Factoryville | Apr 23 | Oct 20 | 180 d | 6a |
| Fairbank | Apr 30 | Oct 18 | 171 d | 6b |
| Fairchance | Apr 30 | Oct 18 | 171 d | 6b |
| Fairfield | Apr 28 | Oct 17 | 172 d | 7a |
| Fairhope | May 12 | Oct 5 | 146 d | 6b |
| Fairless Hills | Apr 21 | Oct 25 | 187 d | 7a |
| Fairmount City | May 10 | Oct 12 | 155 d | 6a |
| Fairview | Apr 26 | Nov 4 | 192 d | 6b |
| Fairview Village | Apr 8 | Oct 31 | 206 d | 7a |
| Fallentimber | May 10 | Oct 5 | 148 d | 6a |
| Falls | Apr 23 | Oct 20 | 180 d | 6b |
| Falls Creek | May 6 | Oct 14 | 161 d | 6a |
| Fannettsburg | Apr 18 | Oct 25 | 190 d | 7a |
| Farmington | May 19 | Oct 1 | 135 d | 6a |
| Farrell | May 1 | Oct 17 | 169 d | 6a |
| Fawn Grove | Apr 1 | Nov 10 | 223 d | 7a |
| Fayette City | Apr 13 | Nov 5 | 206 d | 6b |
| Fayetteville | Apr 27 | Oct 20 | 176 d | 7a |
| Feasterville Trevose | Apr 21 | Oct 25 | 187 d | 7a |
| Felton | Apr 26 | Oct 19 | 176 d | 7a |
| Fenelton | May 7 | Oct 14 | 160 d | 6a |
| Ferndale | Apr 29 | Oct 16 | 170 d | 6b |
| Finleyville | Apr 18 | Oct 28 | 193 d | 6b |
| Fisher | May 13 | Oct 7 | 147 d | 6a |
| Fishertown | Apr 29 | Oct 13 | 167 d | 6b |
| Fleetville | May 14 | Oct 1 | 140 d | 6a |
| Fleetwood | Apr 10 | Oct 31 | 204 d | 7a |
| Fleming | Apr 20 | Oct 26 | 189 d | 6b |
| Flinton | May 10 | Oct 5 | 148 d | 6a |
| Flourtown | Apr 8 | Oct 31 | 206 d | 7b |
| Fogelsville | Apr 26 | Oct 14 | 171 d | 6b |
| Folcroft | Apr 2 | Nov 10 | 222 d | 7b |
| Folsom | Apr 2 | Nov 10 | 222 d | 7b |
| Fombell | Apr 27 | Oct 25 | 181 d | 6b |
| Forbes Road | May 2 | Oct 14 | 165 d | 6b |
| Force | May 13 | Oct 11 | 151 d | 6a |
| Ford City | May 4 | Oct 16 | 165 d | 6b |
| Ford Cliff | May 4 | Oct 16 | 165 d | 6b |
| Forest City | May 14 | Oct 1 | 140 d | 6a |
| Forest Grove | Apr 13 | Oct 30 | 200 d | 7a |
| Forestville | May 7 | Oct 14 | 160 d | 6a |
| Forksville | May 6 | Oct 7 | 154 d | 6a |
| Fort Hill | Apr 30 | Oct 18 | 171 d | 6a |
| Fort Littleton | Apr 18 | Oct 25 | 190 d | 7a |
| Fort Loudon | Apr 18 | Oct 25 | 190 d | 7a |
| Fort Washington | Apr 11 | Nov 1 | 204 d | 7b |
| Fountainville | Apr 13 | Oct 30 | 200 d | 7a |
| Foxburg | May 9 | Oct 11 | 155 d | 6a |
| Frackville | Apr 30 | Oct 22 | 175 d | 6b |
| Franconia | Apr 26 | Oct 17 | 174 d | 7a |
| Franklin | May 2 | Oct 23 | 174 d | 6a |
| Franklintown | Apr 23 | Oct 18 | 178 d | 7a |
| Frederick | Apr 20 | Oct 23 | 186 d | 7a |
| Fredericksburg | Apr 20 | Oct 25 | 188 d | 7a |
| Fredericktown | Apr 13 | Nov 5 | 206 d | 6b |
| Fredonia | May 15 | Oct 3 | 141 d | 6a |
| Freeburg | Apr 25 | Oct 22 | 180 d | 6b |
| Freedom | Apr 27 | Oct 25 | 181 d | 6b |
| Freeland | May 7 | Oct 6 | 152 d | 6a |
| Freeport | Apr 21 | Oct 30 | 192 d | 6b |
| Frenchville | May 4 | Oct 11 | 160 d | 6a |
| Friedens | May 4 | Oct 10 | 159 d | 6a |
| Friedensburg | Apr 16 | Oct 25 | 192 d | 7a |
| Friendsville | May 14 | Oct 2 | 141 d | 6a |
| Fryburg | May 1 | Oct 25 | 177 d | 6a |
| Furlong | Apr 13 | Oct 30 | 200 d | 7a |