Massachusetts frost dates: C
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Cambridge | Apr 19 | Oct 23 | 187 d | 6b |
| Canton | Apr 25 | Oct 9 | 167 d | 6b |
| Carlisle | Apr 27 | Oct 13 | 169 d | 6b |
| Carver | Apr 30 | Oct 16 | 169 d | 6b |
| Cataumet | Apr 21 | Oct 24 | 186 d | 7a |
| Centerville | Apr 16 | Oct 30 | 197 d | 7a |
| Charlemont | May 17 | Oct 1 | 137 d | 5b |
| Charlestown | Apr 4 | Nov 9 | 219 d | 7a |
| Charlton | May 1 | Oct 10 | 162 d | 6b |
| Charlton City | May 1 | Oct 10 | 162 d | 6a |
| Charlton Depot | May 1 | Oct 10 | 162 d | 6b |
| Chartley | Apr 27 | Oct 15 | 171 d | 6b |
| Chatham | Apr 13 | Nov 4 | 205 d | 7b |
| Chelmsford | Apr 30 | Oct 10 | 163 d | 6b |
| Chelsea | Apr 4 | Nov 9 | 219 d | 7a |
| Cherry Valley | Apr 23 | Oct 21 | 181 d | 6b |
| Cheshire | May 10 | Oct 4 | 147 d | 5b |
| Chester | May 13 | Oct 2 | 142 d | 6a |
| Chesterfield | May 13 | Oct 2 | 142 d | 6a |
| Chestnut Hill | Apr 19 | Oct 23 | 187 d | 6b |
| Chicopee | May 3 | Oct 8 | 158 d | 6a |
| Chilmark | May 7 | Oct 9 | 155 d | 7b |
| Clinton | Apr 29 | Oct 11 | 165 d | 6a |
| Cohasset | Apr 25 | Oct 22 | 180 d | 7a |
| Colrain | May 14 | Oct 4 | 143 d | 5b |
| Concord | May 2 | Oct 6 | 157 d | 6b |
| Conway | May 1 | Oct 11 | 163 d | 6a |
| Cotuit | Apr 26 | Oct 26 | 183 d | 7a |
| Cummaquid | Apr 22 | Oct 28 | 189 d | 7a |
| Cummington | May 13 | Oct 2 | 142 d | 5b |
| Cuttyhunk | Apr 11 | Nov 5 | 208 d | 7b |