Idaho frost dates: D
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Dayton | May 16 | Sep 28 | 135 d | 6a |
| Deary | May 16 | Sep 23 | 130 d | 6b |
| Declo | May 16 | Oct 1 | 138 d | 6a |
| Desmet | May 15 | Sep 21 | 129 d | 6b |
| Dietrich | Apr 24 | Oct 16 | 175 d | 6a |
| Dingle | May 19 | Sep 21 | 125 d | 5a |
| Donnelly | May 30 | Sep 19 | 112 d | 5a |
| Dover | May 8 | Sep 28 | 143 d | 6b |
| Downey | May 31 | Sep 18 | 110 d | 6b |
| Driggs | Jun 13 | Sep 9 | 88 d | 5a |
| Dubois | May 18 | Sep 30 | 135 d | 5b |