New Hampshire frost dates: F
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Farmington | Apr 30 | Oct 9 | 162 d | 6a |
| Fitzwilliam | May 5 | Oct 6 | 154 d | 6a |
| Francestown | May 2 | Oct 8 | 159 d | 6a |
| Franconia | May 24 | Sep 18 | 117 d | 5a |
| Franklin | May 7 | Oct 3 | 149 d | 5b |
| Freedom | May 16 | Sep 26 | 133 d | 5a |
| Fremont | May 7 | Oct 4 | 150 d | 6a |