Massachusetts frost dates: H
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Hadley | May 5 | Oct 8 | 156 d | 6a |
| Halifax | May 1 | Oct 9 | 161 d | 6b |
| Hamilton | May 4 | Oct 12 | 161 d | 6b |
| Hampden | May 7 | Oct 12 | 158 d | 6a |
| Hanover | Apr 25 | Oct 22 | 180 d | 6b |
| Hanscom Afb | Apr 28 | Oct 10 | 165 d | 6b |
| Hanson | Apr 22 | Oct 19 | 180 d | 6b |
| Hardwick | May 3 | Oct 14 | 164 d | 6a |
| Harvard | May 2 | Oct 6 | 157 d | 6a |
| Harwich | Apr 13 | Nov 4 | 205 d | 7b |
| Harwich Port | Apr 13 | Nov 3 | 204 d | 7b |
| Hatfield | May 5 | Oct 8 | 156 d | 6a |
| Hathorne | May 3 | Oct 9 | 159 d | 6b |
| Haverhill | May 1 | Oct 12 | 164 d | 6a |
| Haydenville | May 5 | Oct 8 | 156 d | 6a |
| Heath | May 14 | Oct 4 | 143 d | 5b |
| Hingham | Apr 25 | Oct 22 | 180 d | 7a |
| Hinsdale | May 13 | Oct 2 | 142 d | 5b |
| Holbrook | Apr 22 | Oct 19 | 180 d | 6b |
| Holden | Apr 23 | Oct 21 | 181 d | 6b |
| Holland | Apr 25 | Oct 13 | 171 d | 6a |
| Holliston | Apr 30 | Oct 9 | 162 d | 6b |
| Holyoke | May 3 | Oct 8 | 158 d | 6a |
| Hopedale | Apr 30 | Oct 9 | 162 d | 6b |
| Hopkinton | Apr 30 | Oct 9 | 162 d | 6b |
| Housatonic | May 7 | Oct 3 | 149 d | 5b |
| Hubbardston | May 12 | Oct 1 | 142 d | 5b |
| Hudson | May 2 | Oct 6 | 157 d | 6b |
| Hull | Apr 25 | Oct 22 | 180 d | 7a |
| Humarock | Apr 15 | Nov 1 | 200 d | 7a |
| Huntington | May 13 | Oct 2 | 142 d | 6a |
| Hyannis | Apr 16 | Oct 30 | 197 d | 7a |
| Hyannis Port | Apr 16 | Oct 30 | 197 d | 7a |
| Hyde Park | Apr 18 | Oct 26 | 191 d | 6b |