Maine frost dates: C
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Calais | Apr 21 | Oct 26 | 188 d | 5b |
| Cambridge | May 11 | Oct 1 | 143 d | 5a |
| Camden | Apr 27 | Oct 19 | 175 d | 5b |
| Canaan | May 11 | Oct 1 | 143 d | 5a |
| Canton | May 6 | Oct 3 | 150 d | 5a |
| Cape Elizabeth | Apr 26 | Oct 15 | 172 d | 6a |
| Cape Neddick | May 1 | Oct 14 | 166 d | 6a |
| Cape Porpoise | May 9 | Oct 3 | 147 d | 6a |
| Caratunk | May 13 | Sep 30 | 140 d | 5a |
| Caribou | May 7 | Oct 1 | 147 d | 4a |
| Carmel | May 4 | Oct 4 | 153 d | 5a |
| Casco | Apr 30 | Oct 20 | 173 d | 5b |
| Castine | May 7 | Oct 5 | 151 d | 5b |
| Center Lovell | May 5 | Oct 5 | 153 d | 5a |
| Chamberlain | Apr 27 | Oct 18 | 174 d | 6a |
| Charleston | May 15 | Sep 28 | 136 d | 5a |
| Chebeague Island | Apr 26 | Oct 15 | 172 d | 6a |
| Cherryfield | May 3 | Oct 9 | 159 d | 5b |
| China Village | May 11 | Oct 1 | 143 d | 5b |
| Clayton Lake | May 30 | Sep 13 | 106 d | 3b |
| Cliff Island | Apr 26 | Oct 15 | 172 d | 6a |
| Clinton | May 2 | Oct 10 | 161 d | 5a |
| Columbia Falls | May 3 | Oct 9 | 159 d | 5b |
| Coopers Mills | May 1 | Oct 11 | 163 d | 5b |
| Corea | Apr 27 | Oct 22 | 178 d | 6a |
| Corinna | May 8 | Oct 3 | 148 d | 4b |
| Corinth | May 8 | Oct 3 | 148 d | 5a |
| Cornish | May 12 | Oct 1 | 142 d | 5a |
| Cranberry Isles | Apr 27 | Oct 22 | 178 d | 6b |
| Crouseville | May 14 | Sep 26 | 135 d | 4a |
| Cumberland Center | Apr 28 | Oct 19 | 174 d | 5b |
| Cumberland Foreside | Apr 26 | Oct 15 | 172 d | 6a |
| Cushing | Apr 27 | Oct 25 | 181 d | 6a |
| Cutler | May 3 | Oct 9 | 159 d | 6a |