Tennessee frost dates: R
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Ramer | Apr 6 | Oct 30 | 207 d | 7b |
| Readyville | Apr 17 | Oct 21 | 187 d | 7b |
| Reagan | Apr 5 | Oct 30 | 208 d | 7b |
| Red Boiling Springs | Apr 3 | Nov 1 | 212 d | 7b |
| Reliance | Apr 6 | Oct 30 | 207 d | 7b |
| Riceville | Apr 6 | Oct 31 | 208 d | 7b |
| Rickman | Apr 12 | Oct 25 | 196 d | 7a |
| Riddleton | Apr 12 | Oct 26 | 197 d | 7b |
| Ridgely | Mar 24 | Nov 9 | 230 d | 7b |
| Ridgetop | Apr 7 | Oct 28 | 204 d | 7a |
| Ripley | Mar 26 | Nov 6 | 225 d | 8a |
| Rives | Apr 3 | Oct 29 | 209 d | 7b |
| Roan Mountain | Apr 30 | Oct 12 | 165 d | 6b |
| Robbins | Apr 23 | Oct 18 | 178 d | 7a |
| Rock Island | Apr 6 | Oct 30 | 207 d | 7b |
| Rockford | Apr 1 | Nov 2 | 215 d | 7b |
| Rockvale | Apr 14 | Oct 25 | 194 d | 7b |
| Rockwood | Apr 8 | Oct 31 | 206 d | 7a |
| Rogersville | Apr 14 | Oct 24 | 193 d | 7b |
| Rossville | Mar 29 | Nov 3 | 219 d | 8a |
| Rugby | Apr 17 | Oct 23 | 189 d | 7a |
| Russellville | Apr 10 | Oct 28 | 201 d | 7b |
| Rutherford | Apr 4 | Oct 28 | 207 d | 7b |
| Rutledge | Mar 31 | Nov 4 | 218 d | 7b |