Oregon frost dates: N
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Nehalem | Apr 2 | Nov 12 | 224 d | 8b |
| Neotsu | Apr 4 | Nov 16 | 226 d | 9a |
| Neskowin | Apr 4 | Nov 16 | 226 d | 9a |
| Netarts | Apr 22 | Oct 21 | 182 d | 9a |
| New Pine Creek | May 26 | Oct 1 | 128 d | 6b |
| Newberg | Mar 21 | Nov 22 | 246 d | 8b |
| Newport | Mar 21 | Nov 27 | 251 d | 9b |
| North Bend | Feb 21 | Dec 9 | 291 d | 9a |
| North Plains | Apr 16 | Oct 23 | 190 d | 8b |
| North Powder | May 11 | Sep 26 | 138 d | 6b |
| Noti | Apr 18 | Oct 25 | 190 d | 8b |
| Nyssa | Apr 18 | Oct 18 | 183 d | 7a |