Louisiana frost dates: N
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Napoleonville | Feb 21 | Dec 5 | 287 d | 9b |
| Natalbany | Mar 8 | Nov 19 | 256 d | 9a |
| Natchez | Feb 28 | Dec 1 | 276 d | 9a |
| Natchitoches | Feb 28 | Dec 1 | 276 d | 9a |
| Negreet | Mar 20 | Nov 9 | 234 d | 9a |
| New Iberia | Feb 10 | Dec 11 | 304 d | 9b |
| New Llano | Mar 20 | Nov 9 | 234 d | 9a |
| New Orleans | Feb 1 | Dec 31 | 333 d | 9b |
| New Orleans (Jefferson Parish) | Feb 10 | Dec 12 | 305 d | 9b |
| New Roads | Feb 19 | Dec 5 | 289 d | 9a |
| New Sarpy | Jan 30 | Dec 31 | 335 d | 9b |
| Newellton | Mar 13 | Nov 10 | 242 d | 8b |
| Noble | Mar 20 | Nov 9 | 234 d | 8b |
| Norco | Jan 30 | Dec 31 | 335 d | 9b |
| Norwood | Mar 13 | Nov 17 | 249 d | 9a |