South Carolina frost dates: R
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Rains | Mar 22 | Nov 11 | 234 d | 8b |
| Ravenel | Mar 7 | Nov 27 | 265 d | 9a |
| Reevesville | Mar 22 | Nov 12 | 235 d | 8b |
| Reidville | Mar 28 | Nov 7 | 224 d | 8a |
| Rembert | Apr 4 | Nov 4 | 214 d | 8b |
| Richburg | Apr 3 | Nov 2 | 213 d | 8a |
| Richland | Apr 11 | Oct 30 | 202 d | 8a |
| Ridge Spring | Mar 20 | Nov 18 | 243 d | 8a |
| Ridgeland | Feb 28 | Dec 3 | 278 d | 9a |
| Ridgeville | Mar 22 | Nov 12 | 235 d | 8b |
| Ridgeway | Mar 31 | Nov 6 | 220 d | 8a |
| Rion | Mar 31 | Nov 6 | 220 d | 8a |
| Rock Hill | Mar 31 | Nov 4 | 218 d | 8a |
| Roebuck | Apr 8 | Nov 1 | 207 d | 8a |
| Round O | Mar 19 | Nov 12 | 238 d | 8b |
| Rowesville | Mar 15 | Nov 19 | 249 d | 8b |
| Ruby | Apr 1 | Nov 3 | 216 d | 8a |
| Ruffin | Mar 19 | Nov 12 | 238 d | 8b |
| Russellville | Mar 10 | Nov 26 | 261 d | 8b |