Louisiana frost dates: R
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Raceland | Feb 5 | Dec 14 | 312 d | 9b |
| Ragley | Mar 2 | Nov 25 | 268 d | 9a |
| Rayne | Feb 20 | Dec 4 | 287 d | 9a |
| Rayville | Feb 28 | Nov 26 | 271 d | 8b |
| Reddell | Feb 26 | Nov 27 | 274 d | 9a |
| Reeves | Mar 2 | Nov 25 | 268 d | 9a |
| Reserve | Feb 9 | Dec 14 | 308 d | 9b |
| Rhinehart | Mar 19 | Nov 12 | 238 d | 9a |
| Ringgold | Mar 24 | Nov 7 | 228 d | 8b |
| Roanoke | Feb 19 | Dec 4 | 288 d | 9a |
| Robeline | Feb 28 | Dec 1 | 276 d | 9a |
| Robert | Mar 8 | Nov 19 | 256 d | 9a |
| Rodessa | Mar 19 | Nov 11 | 237 d | 8b |
| Rosedale | Feb 28 | Nov 24 | 269 d | 9a |
| Roseland | Mar 7 | Nov 18 | 256 d | 9a |
| Rosepine | Mar 8 | Nov 21 | 258 d | 9a |
| Rougon | Feb 19 | Dec 5 | 289 d | 9a |
| Ruby | Mar 1 | Nov 22 | 266 d | 9a |
| Ruston | Mar 11 | Nov 16 | 250 d | 8b |