North Dakota frost dates: T
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Tappen | May 14 | Sep 27 | 136 d | 4a |
| Taylor | May 9 | Oct 1 | 145 d | 4a |
| Thompson | May 10 | Oct 1 | 144 d | 4a |
| Tioga | May 11 | Sep 26 | 138 d | 3b |
| Tokio | May 6 | Oct 5 | 152 d | 4a |
| Tolley | May 15 | Sep 23 | 131 d | 4a |
| Tolna | May 12 | Sep 28 | 139 d | 4a |
| Tower City | May 13 | Sep 26 | 136 d | 4a |
| Towner | May 17 | Sep 22 | 128 d | 3b |
| Trenton | May 13 | Sep 26 | 136 d | 4a |
| Turtle Lake | May 14 | Sep 26 | 135 d | 4a |
| Tuttle | May 13 | Sep 29 | 139 d | 4a |