Arizona frost dates: H
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Hackberry | Apr 2 | Nov 11 | 223 d | 8a |
| Happy Jack | Jun 1 | Oct 3 | 124 d | 7a |
| Hayden | Mar 13 | Nov 19 | 251 d | 9a |
| Heber | May 23 | Oct 5 | 135 d | 7a |
| Hereford | Apr 7 | Nov 9 | 216 d | 8b |
| Higley | Feb 1 | Dec 11 | 313 d | 9b |
| Holbrook | Apr 22 | Oct 24 | 185 d | 7a |
| Hotevilla | May 16 | Oct 10 | 147 d | 7a |
| Houck | May 22 | Oct 8 | 139 d | 6b |
| Huachuca City | Mar 16 | Nov 21 | 250 d | 8b |
| Hualapai | Apr 2 | Nov 11 | 223 d | 8b |
| Humboldt | Apr 30 | Oct 20 | 173 d | 8a |