North Dakota frost dates: D
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Dahlen | May 11 | Sep 28 | 140 d | 4a |
| Davenport | May 9 | Oct 1 | 145 d | 4a |
| Dawson | May 15 | Sep 25 | 133 d | 4a |
| Dazey | May 17 | Sep 23 | 129 d | 4a |
| Deering | May 9 | Oct 1 | 145 d | 3b |
| Denhoff | May 8 | Oct 1 | 146 d | 4a |
| Des Lacs | May 13 | Sep 27 | 137 d | 4a |
| Devils Lake | May 6 | Oct 5 | 152 d | 4a |
| Dickey | May 10 | Sep 28 | 141 d | 4b |
| Dickinson | May 18 | Sep 25 | 130 d | 4a |
| Dodge | May 20 | Sep 21 | 124 d | 4a |
| Donnybrook | May 11 | Sep 29 | 141 d | 4a |
| Douglas | May 10 | Sep 28 | 141 d | 4a |
| Drake | May 12 | Sep 27 | 138 d | 4a |
| Drayton | May 4 | Oct 7 | 156 d | 4a |
| Driscoll | May 15 | Sep 25 | 133 d | 4a |
| Dunn Center | May 20 | Sep 21 | 124 d | 4a |
| Dunseith | May 19 | Sep 24 | 128 d | 3b |