South Carolina frost dates: M
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Manning | Mar 25 | Nov 11 | 231 d | 8b |
| Marietta | Apr 10 | Nov 2 | 206 d | 8a |
| Marion | Mar 22 | Nov 11 | 234 d | 8b |
| Martin | Mar 28 | Nov 7 | 224 d | 8b |
| Mauldin | Mar 28 | Nov 7 | 224 d | 8a |
| Mayesville | Mar 24 | Nov 7 | 228 d | 8b |
| Mayo | Apr 13 | Oct 26 | 196 d | 8a |
| Mc Bee | Mar 30 | Nov 6 | 221 d | 8a |
| Mc Clellanville | Mar 17 | Nov 21 | 249 d | 9a |
| Mc Coll | Mar 26 | Nov 8 | 227 d | 8a |
| Mc Connells | Apr 1 | Nov 3 | 216 d | 8a |
| Mc Cormick | Mar 28 | Nov 7 | 224 d | 8a |
| Miley | Mar 6 | Nov 26 | 265 d | 8b |
| Modoc | Mar 15 | Nov 18 | 248 d | 8b |
| Moncks Corner | Mar 10 | Nov 26 | 261 d | 8b |
| Monetta | Mar 20 | Nov 18 | 243 d | 8a |
| Montmorenci | Mar 21 | Nov 7 | 231 d | 8b |
| Moore | Apr 8 | Nov 1 | 207 d | 8a |
| Mount Carmel | Mar 27 | Nov 7 | 225 d | 8b |
| Mount Croghan | Mar 27 | Nov 8 | 226 d | 8a |
| Mount Pleasant | Mar 13 | Nov 30 | 262 d | 9a |
| Mountain Rest | Apr 11 | Oct 30 | 202 d | 8a |
| Mountville | Mar 22 | Nov 13 | 236 d | 8a |
| Mullins | Mar 26 | Nov 11 | 230 d | 8b |
| Murrells Inlet | Mar 18 | Nov 18 | 245 d | 8b |
| Myrtle Beach | Mar 21 | Nov 13 | 237 d | 8b |