Utah frost dates: H
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Hanksville | May 5 | Oct 3 | 151 d | 7a |
| Hanna | Jun 11 | Sep 18 | 99 d | 5a |
| Hatch | Jun 19 | Sep 13 | 86 d | 6a |
| Heber City | Jun 4 | Sep 20 | 108 d | 6a |
| Helper | May 3 | Oct 12 | 162 d | 6a |
| Henefer | May 30 | Sep 18 | 111 d | 6a |
| Henrieville | May 31 | Sep 28 | 120 d | 6b |
| Herriman | Apr 18 | Oct 22 | 187 d | 7a |
| Hildale | Apr 26 | Oct 25 | 182 d | 7a |
| Hill Afb | Apr 29 | Oct 20 | 174 d | 7a |
| Hinckley | May 14 | Sep 30 | 139 d | 6a |
| Holden | May 4 | Oct 14 | 163 d | 6a |
| Honeyville | Apr 24 | Oct 17 | 176 d | 6b |
| Hooper | Apr 22 | Oct 22 | 183 d | 7a |
| Howell | May 17 | Sep 24 | 130 d | 6a |
| Huntington | May 18 | Sep 27 | 132 d | 6a |
| Huntsville | Jun 4 | Sep 16 | 104 d | 6a |
| Hurricane | Apr 1 | Nov 5 | 218 d | 8b |
| Hyde Park | May 8 | Oct 2 | 147 d | 6a |
| Hyrum | May 12 | Sep 28 | 139 d | 6a |