New Hampshire frost dates: C
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Campton | May 20 | Sep 27 | 130 d | 5a |
| Canaan | May 21 | Sep 26 | 128 d | 5a |
| Candia | Apr 30 | Oct 11 | 164 d | 6a |
| Canterbury | May 14 | Sep 29 | 138 d | 5b |
| Center Barnstead | Apr 30 | Oct 9 | 162 d | 5b |
| Center Conway | May 17 | Sep 25 | 131 d | 5a |
| Center Harbor | Apr 28 | Oct 16 | 171 d | 5b |
| Center Ossipee | May 16 | Sep 26 | 133 d | 5a |
| Center Sandwich | May 6 | Oct 6 | 153 d | 5b |
| Center Strafford | Apr 30 | Oct 9 | 162 d | 6a |
| Center Tuftonboro | May 6 | Oct 6 | 153 d | 5b |
| Charlestown | May 9 | Oct 2 | 146 d | 5b |
| Chester | Apr 30 | Oct 11 | 164 d | 6a |
| Chesterfield | May 14 | Oct 1 | 140 d | 6a |
| Chichester | May 8 | Oct 3 | 148 d | 5b |
| Chocorua | May 16 | Sep 26 | 133 d | 5a |
| Claremont | May 14 | Oct 1 | 140 d | 5b |
| Colebrook | May 31 | Sep 21 | 113 d | 4a |
| Concord | May 8 | Oct 3 | 148 d | 5b |
| Contoocook | May 6 | Oct 1 | 148 d | 5b |
| Conway | May 7 | Oct 5 | 151 d | 5a |
| Cornish | May 8 | Oct 6 | 151 d | 5b |
| Cornish Flat | May 8 | Oct 6 | 151 d | 5a |