Maryland frost dates: C
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Cabin John | Apr 9 | Oct 31 | 205 d | 7b |
| California | Mar 22 | Nov 26 | 249 d | 7b |
| Callaway | Mar 22 | Nov 26 | 249 d | 8a |
| Cambridge | Apr 1 | Nov 7 | 220 d | 8a |
| Capitol Heights | Mar 29 | Nov 8 | 224 d | 7b |
| Cascade | Apr 14 | Oct 30 | 199 d | 7a |
| Catonsville | Apr 2 | Nov 7 | 219 d | 7b |
| Cavetown | Apr 25 | Oct 19 | 177 d | 7a |
| Cecilton | Apr 3 | Nov 5 | 216 d | 7b |
| Centreville | Apr 3 | Nov 5 | 216 d | 7b |
| Chaptico | Apr 17 | Oct 27 | 193 d | 7b |
| Charlestown | Apr 3 | Nov 6 | 217 d | 7b |
| Charlotte Hall | Apr 17 | Oct 27 | 193 d | 7b |
| Chase | Apr 10 | Oct 30 | 203 d | 8a |
| Cheltenham | Apr 9 | Oct 29 | 203 d | 7b |
| Chesapeake Beach | Apr 17 | Oct 27 | 193 d | 8a |
| Chesapeake City | Apr 7 | Nov 2 | 209 d | 7b |
| Chester | Mar 29 | Nov 12 | 228 d | 8a |
| Chestertown | Apr 3 | Nov 5 | 216 d | 7b |
| Chevy Chase | Apr 9 | Oct 31 | 205 d | 7b |
| Chewsville | Apr 25 | Oct 19 | 177 d | 7a |
| Childs | Apr 7 | Nov 2 | 209 d | 7a |
| Church Creek | Mar 29 | Nov 15 | 231 d | 8a |
| Church Hill | Apr 3 | Nov 5 | 216 d | 7b |
| Churchton | Mar 23 | Nov 20 | 242 d | 8a |
| Churchville | Apr 3 | Nov 6 | 217 d | 7a |
| Claiborne | Apr 1 | Nov 7 | 220 d | 8a |
| Clarksburg | Apr 14 | Oct 29 | 198 d | 7a |
| Clarksville | Apr 5 | Nov 9 | 218 d | 7b |
| Clear Spring | Apr 7 | Nov 4 | 211 d | 7a |
| Clements | Apr 17 | Oct 27 | 193 d | 7b |
| Clinton | Apr 3 | Nov 8 | 219 d | 7b |
| Cobb Island | Apr 17 | Oct 27 | 193 d | 8a |
| Cockeysville | Apr 2 | Nov 7 | 219 d | 7b |
| College Park | Mar 29 | Nov 8 | 224 d | 7b |
| Colora | Apr 3 | Nov 6 | 217 d | 7a |
| Coltons Point | Apr 8 | Oct 30 | 205 d | 8a |
| Columbia | Apr 5 | Nov 9 | 218 d | 7b |
| Compton | Mar 22 | Nov 26 | 249 d | 7b |
| Conowingo | Apr 3 | Nov 6 | 217 d | 7a |
| Cooksville | Apr 14 | Oct 29 | 198 d | 7a |
| Cordova | Apr 1 | Nov 7 | 220 d | 7b |
| Corriganville | Apr 15 | Oct 24 | 192 d | 7a |
| Crapo | Mar 29 | Nov 15 | 231 d | 8a |
| Crisfield | Mar 31 | Nov 11 | 225 d | 8a |
| Crocheron | Mar 29 | Nov 15 | 231 d | 8a |
| Crofton | Apr 22 | Oct 22 | 183 d | 7b |
| Crownsville | Mar 27 | Nov 13 | 231 d | 7b |
| Crumpton | Apr 3 | Nov 5 | 216 d | 7b |
| Cumberland | Apr 15 | Oct 24 | 192 d | 7a |
| Curtis Bay | Mar 24 | Nov 21 | 242 d | 8a |