Wisconsin frost dates: H
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Hager City | Apr 23 | Oct 14 | 174 d | 4b |
| Hales Corners | May 3 | Oct 14 | 164 d | 5b |
| Hammond | May 6 | Oct 2 | 149 d | 4b |
| Hancock | May 10 | Oct 3 | 146 d | 4b |
| Hannibal | May 20 | Sep 23 | 126 d | 4a |
| Hanover | Apr 26 | Oct 15 | 172 d | 5b |
| Harshaw | May 26 | Sep 23 | 120 d | 4a |
| Hartford | May 8 | Oct 3 | 148 d | 5a |
| Hartland | Apr 30 | Oct 12 | 165 d | 5b |
| Hatley | May 6 | Oct 5 | 152 d | 4b |
| Haugen | May 5 | Oct 4 | 152 d | 4a |
| Hawkins | May 20 | Sep 23 | 126 d | 4a |
| Hawthorne | May 12 | Oct 2 | 143 d | 4a |
| Hayward | May 23 | Sep 22 | 122 d | 4a |
| Hazel Green | Apr 19 | Oct 21 | 185 d | 5a |
| Hazelhurst | May 13 | Oct 3 | 143 d | 4a |
| Heafford Junction | May 10 | Oct 4 | 147 d | 4a |
| Helenville | Apr 25 | Oct 18 | 176 d | 5b |
| Herbster | May 31 | Oct 2 | 124 d | 4b |
| Hertel | May 14 | Sep 28 | 137 d | 4a |
| Hewitt | May 5 | Oct 5 | 153 d | 4b |
| High Bridge | May 26 | Sep 27 | 124 d | 4b |
| Highland | May 3 | Oct 7 | 157 d | 5a |
| Hilbert | May 6 | Oct 6 | 153 d | 5b |
| Hillpoint | Apr 24 | Oct 20 | 179 d | 5a |
| Hillsboro | May 12 | Sep 29 | 140 d | 4b |
| Hingham | May 3 | Oct 16 | 166 d | 5b |
| Hixton | May 9 | Oct 1 | 145 d | 4b |
| Holcombe | May 5 | Oct 2 | 150 d | 4b |
| Hollandale | May 3 | Oct 7 | 157 d | 5a |
| Holmen | Apr 23 | Oct 17 | 177 d | 5a |
| Honey Creek | May 5 | Oct 10 | 158 d | 5b |
| Horicon | May 1 | Oct 10 | 162 d | 5a |
| Hortonville | May 4 | Oct 6 | 155 d | 5a |
| Houlton | Apr 22 | Oct 19 | 180 d | 4b |
| Hubertus | Apr 30 | Oct 16 | 169 d | 5a |
| Hudson | Apr 22 | Oct 19 | 180 d | 4b |
| Humbird | May 7 | Oct 1 | 147 d | 4b |
| Hurley | May 24 | Sep 28 | 127 d | 4a |
| Hustisford | Apr 28 | Oct 10 | 165 d | 5a |
| Hustler | May 2 | Oct 7 | 158 d | 4b |