Alabama frost dates: R
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Ragland | Mar 26 | Nov 4 | 223 d | 8a |
| Rainbow City | Mar 19 | Nov 13 | 239 d | 8a |
| Rainsville | Mar 29 | Nov 8 | 224 d | 8a |
| Ralph | Mar 12 | Nov 15 | 248 d | 8b |
| Ramer | Mar 12 | Nov 18 | 251 d | 8b |
| Ranburne | Apr 6 | Oct 31 | 208 d | 8a |
| Randolph | Mar 21 | Nov 11 | 235 d | 8a |
| Range | Mar 10 | Nov 17 | 252 d | 8b |
| Red Bay | Mar 31 | Nov 4 | 218 d | 7b |
| Red Level | Mar 25 | Nov 9 | 229 d | 8b |
| Reform | Mar 24 | Nov 8 | 229 d | 8a |
| Remlap | Apr 4 | Nov 1 | 211 d | 8a |
| Repton | Mar 10 | Nov 17 | 252 d | 8b |
| River Falls | Mar 25 | Nov 9 | 229 d | 8b |
| Riverside | Mar 26 | Nov 4 | 223 d | 8a |
| Roanoke | Apr 2 | Nov 3 | 215 d | 8a |
| Robertsdale | Mar 5 | Nov 23 | 263 d | 9a |
| Rockford | Mar 25 | Nov 11 | 231 d | 8a |
| Rogersville | Mar 29 | Nov 4 | 220 d | 8a |
| Russellville | Apr 5 | Oct 28 | 206 d | 7b |
| Rutledge | Mar 31 | Nov 5 | 219 d | 8b |
| Ryland | Apr 4 | Oct 30 | 209 d | 8a |