South Dakota frost dates: H
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Hamill | May 1 | Oct 10 | 162 d | 5a |
| Harrisburg | May 1 | Oct 6 | 158 d | 5a |
| Harrison | May 3 | Oct 6 | 156 d | 5a |
| Harrold | May 17 | Sep 24 | 130 d | 4b |
| Hartford | Apr 26 | Oct 13 | 170 d | 5a |
| Hayes | May 10 | Sep 27 | 140 d | 4b |
| Hayti | May 6 | Oct 1 | 148 d | 4b |
| Hazel | May 3 | Oct 4 | 154 d | 4b |
| Hecla | May 7 | Sep 29 | 145 d | 4a |
| Henry | May 5 | Oct 5 | 153 d | 4b |
| Hermosa | May 15 | Oct 1 | 139 d | 5a |
| Herreid | May 8 | Sep 30 | 145 d | 4b |
| Herrick | May 3 | Oct 10 | 160 d | 5a |
| Highmore | May 12 | Oct 1 | 142 d | 4b |
| Hill City | Jun 1 | Sep 10 | 101 d | 4b |
| Hitchcock | May 6 | Oct 2 | 149 d | 4b |
| Holabird | May 12 | Oct 1 | 142 d | 4b |
| Hosmer | May 7 | Oct 3 | 149 d | 4b |
| Hot Springs | May 16 | Sep 27 | 134 d | 5a |
| Houghton | May 7 | Sep 29 | 145 d | 4a |
| Hoven | May 7 | Oct 2 | 148 d | 4b |
| Howard | May 5 | Oct 2 | 150 d | 4b |
| Howes | May 15 | Sep 27 | 135 d | 4b |
| Hudson | May 1 | Oct 4 | 156 d | 5a |
| Humboldt | May 7 | Sep 29 | 145 d | 4b |
| Hurley | May 1 | Oct 4 | 156 d | 5a |
| Huron | May 6 | Oct 2 | 149 d | 4b |