New Hampshire frost dates: G
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Georges Mills | May 14 | Oct 1 | 140 d | 5b |
| Gilford | Apr 30 | Oct 18 | 171 d | 5b |
| Gilmanton | Apr 30 | Oct 18 | 171 d | 5b |
| Gilmanton Iron Works | Apr 30 | Oct 18 | 171 d | 5b |
| Gilsum | May 14 | Oct 1 | 140 d | 6a |
| Glen | May 7 | Oct 5 | 151 d | 5a |
| Glencliff | May 15 | Sep 28 | 136 d | 5a |
| Goffstown | Apr 21 | Oct 19 | 181 d | 6a |
| Gorham | May 14 | Sep 26 | 135 d | 5a |
| Goshen | May 2 | Oct 9 | 160 d | 6a |
| Grafton | May 21 | Sep 26 | 128 d | 5a |
| Grantham | May 14 | Oct 1 | 140 d | 5a |
| Greenfield | May 2 | Oct 8 | 159 d | 6a |
| Greenland | May 4 | Oct 8 | 157 d | 6a |
| Greenville | May 10 | Oct 6 | 149 d | 6a |
| Groveton | May 19 | Sep 29 | 133 d | 4b |
| Guild | May 14 | Oct 1 | 140 d | 5a |