Minnesota frost dates: N
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Nashua | May 3 | Oct 3 | 153 d | 4a |
| Nashwauk | Jun 5 | Sep 8 | 95 d | 3b |
| Navarre | Apr 29 | Oct 12 | 166 d | 4b |
| Naytahwaush | May 7 | Sep 28 | 144 d | 3b |
| Nelson | May 2 | Oct 8 | 159 d | 4a |
| Nerstrand | May 5 | Oct 5 | 153 d | 4b |
| Nett Lake | Jun 2 | Sep 15 | 105 d | 3b |
| Nevis | May 14 | Sep 25 | 134 d | 3b |
| New Auburn | Apr 30 | Oct 4 | 157 d | 4b |
| New Germany | Apr 30 | Oct 8 | 161 d | 4b |
| New London | May 4 | Oct 4 | 153 d | 4b |
| New Munich | May 4 | Oct 1 | 150 d | 4a |
| New Prague | May 2 | Oct 5 | 156 d | 4b |
| New Richland | May 2 | Oct 4 | 155 d | 4b |
| New Ulm | Apr 29 | Oct 7 | 161 d | 5a |
| New York Mills | May 10 | Sep 29 | 142 d | 4a |
| Newfolden | May 14 | Sep 28 | 137 d | 3b |
| Newport | Apr 24 | Oct 16 | 175 d | 5a |
| Nicollet | May 2 | Oct 7 | 158 d | 5a |
| Nielsville | May 2 | Oct 9 | 160 d | 4a |
| Nisswa | May 2 | Oct 6 | 157 d | 4a |
| Norcross | May 1 | Oct 9 | 161 d | 4b |
| North Branch | May 19 | Sep 25 | 129 d | 4b |
| Northfield | May 5 | Oct 5 | 153 d | 4b |
| Northome | May 16 | Sep 26 | 133 d | 3b |
| Northrop | Apr 25 | Oct 14 | 172 d | 5a |
| Norwood | May 5 | Oct 5 | 153 d | 4b |
| Norwood Young America | May 5 | Oct 5 | 153 d | 4b |
| Noyes | May 16 | Sep 29 | 136 d | 3b |