Michigan frost dates: N
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Nadeau | May 22 | Sep 27 | 128 d | 5a |
| Nahma | May 16 | Sep 24 | 131 d | 5b |
| Napoleon | Apr 30 | Oct 14 | 167 d | 6a |
| Nashville | May 3 | Oct 12 | 162 d | 6a |
| National City | May 23 | Sep 26 | 126 d | 5b |
| National Mine | May 22 | Sep 29 | 130 d | 4b |
| Naubinway | May 26 | Sep 30 | 127 d | 5a |
| Nazareth | Apr 28 | Oct 18 | 173 d | 6a |
| Negaunee | May 22 | Sep 29 | 130 d | 4b |
| New Baltimore | Apr 30 | Oct 24 | 177 d | 6b |
| New Boston | Apr 20 | Oct 27 | 190 d | 6b |
| New Buffalo | Apr 19 | Oct 27 | 191 d | 6a |
| New Era | May 19 | Oct 4 | 138 d | 6a |
| New Haven | May 1 | Oct 20 | 172 d | 6a |
| New Hudson | May 6 | Oct 12 | 159 d | 6a |
| New Lothrop | May 5 | Oct 14 | 162 d | 6a |
| New Troy | Apr 27 | Oct 25 | 181 d | 6a |
| Newaygo | May 8 | Oct 11 | 156 d | 5b |
| Newberry | May 21 | Oct 5 | 137 d | 5a |
| Newport | Apr 27 | Oct 22 | 178 d | 6b |
| Niles | Apr 27 | Oct 25 | 181 d | 6a |
| Nisula | May 23 | Oct 1 | 131 d | 5a |
| North Adams | May 3 | Oct 12 | 162 d | 6a |
| North Branch | May 4 | Oct 14 | 163 d | 6a |
| North Star | May 1 | Oct 13 | 165 d | 6a |
| North Street | Apr 19 | Nov 3 | 198 d | 6a |
| Northport | May 9 | Oct 26 | 170 d | 6b |
| Northville | May 1 | Oct 17 | 169 d | 6a |
| Norvell | Apr 30 | Oct 14 | 167 d | 6a |
| Norway | May 17 | Oct 1 | 137 d | 4b |
| Nottawa | Apr 30 | Oct 17 | 170 d | 6a |
| Novi | May 1 | Oct 17 | 169 d | 6a |
| Nunica | Apr 30 | Oct 24 | 177 d | 6a |