Utah frost dates: D
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Dammeron Valley | Apr 9 | Nov 5 | 210 d | 8a |
| Delta | May 16 | Sep 29 | 136 d | 6a |
| Deweyville | Apr 24 | Oct 17 | 176 d | 6b |
| Draper | Apr 18 | Oct 22 | 187 d | 7a |
| Duchesne | May 6 | Oct 5 | 152 d | 6a |
| Duck Creek Village | Jun 1 | Sep 30 | 121 d | 6a |
| Dugway | May 15 | Oct 5 | 143 d | 6b |
| Dutch John | May 26 | Sep 23 | 120 d | 5b |