Indiana frost dates: H
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Hagerstown | Apr 27 | Oct 9 | 165 d | 6a |
| Hamilton | Apr 30 | Oct 16 | 169 d | 6a |
| Hamlet | Apr 26 | Oct 19 | 176 d | 5b |
| Hammond | Apr 23 | Oct 20 | 180 d | 6a |
| Hanna | Apr 29 | Oct 13 | 167 d | 5b |
| Hanover | Apr 11 | Oct 31 | 203 d | 6b |
| Hardinsburg | Apr 21 | Oct 18 | 180 d | 6b |
| Harlan | Apr 27 | Oct 19 | 175 d | 6a |
| Harmony | Apr 27 | Oct 15 | 171 d | 6a |
| Harrodsburg | Apr 20 | Oct 20 | 183 d | 6b |
| Hartford City | Apr 22 | Oct 22 | 183 d | 6a |
| Hartsville | Apr 15 | Oct 26 | 194 d | 6b |
| Hatfield | Apr 3 | Nov 2 | 213 d | 7a |
| Haubstadt | Apr 4 | Oct 29 | 208 d | 7a |
| Hayden | Apr 21 | Oct 21 | 183 d | 6b |
| Hazleton | Apr 13 | Oct 25 | 195 d | 6b |
| Hebron | Apr 29 | Oct 16 | 170 d | 5b |
| Helmsburg | Apr 15 | Oct 26 | 194 d | 6b |
| Heltonville | Apr 20 | Oct 20 | 183 d | 6b |
| Hemlock | Apr 27 | Oct 18 | 174 d | 6a |
| Henryville | Apr 18 | Oct 20 | 185 d | 6b |
| Highland | Apr 23 | Oct 20 | 180 d | 6a |
| Hillsboro | Apr 22 | Oct 17 | 178 d | 6a |
| Hillsdale | Apr 30 | Oct 12 | 165 d | 6a |
| Hoagland | Apr 23 | Oct 19 | 179 d | 6a |
| Hobart | Apr 22 | Oct 25 | 186 d | 6a |
| Hobbs | Apr 24 | Oct 18 | 177 d | 6a |
| Holland | Apr 6 | Oct 30 | 207 d | 7a |
| Holton | Apr 21 | Oct 21 | 183 d | 6b |
| Homer | Apr 19 | Oct 23 | 187 d | 6a |
| Hope | Apr 11 | Oct 25 | 197 d | 6b |
| Howe | Apr 26 | Oct 21 | 178 d | 6a |
| Hudson | Apr 30 | Oct 16 | 169 d | 6a |
| Huntertown | May 2 | Oct 10 | 161 d | 6a |
| Huntingburg | Apr 6 | Oct 30 | 207 d | 6b |
| Huntington | May 1 | Oct 14 | 166 d | 6a |
| Huron | Apr 10 | Oct 30 | 203 d | 6b |
| Hymera | Apr 14 | Oct 26 | 195 d | 6a |