North Dakota frost dates: G
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Gackle | May 6 | Oct 4 | 151 d | 4a |
| Galesburg | May 10 | Sep 24 | 137 d | 4a |
| Gardner | May 9 | Oct 1 | 145 d | 4a |
| Garrison | May 14 | Sep 26 | 135 d | 4a |
| Gilby | May 16 | Sep 27 | 134 d | 4a |
| Gladstone | May 9 | Oct 1 | 145 d | 4a |
| Glasston | May 12 | Sep 30 | 141 d | 4a |
| Glen Ullin | May 19 | Sep 21 | 125 d | 4a |
| Glenburn | May 10 | Oct 1 | 144 d | 4a |
| Glenfield | May 12 | Sep 28 | 139 d | 4a |
| Golden Valley | May 21 | Sep 20 | 122 d | 4a |
| Golva | May 16 | Sep 26 | 133 d | 4b |
| Goodrich | May 13 | Sep 29 | 139 d | 4a |
| Grace City | May 12 | Sep 28 | 139 d | 4a |
| Grafton | May 4 | Oct 7 | 156 d | 4a |
| Grand Forks | May 10 | Oct 1 | 144 d | 4a |
| Grand Forks Afb | May 16 | Sep 27 | 134 d | 4a |
| Grandin | May 9 | Oct 1 | 145 d | 4a |
| Granville | May 9 | Oct 1 | 145 d | 4a |
| Grassy Butte | May 18 | Sep 23 | 128 d | 4a |
| Grenora | May 16 | Sep 18 | 125 d | 3b |
| Gwinner | May 7 | Oct 1 | 147 d | 4a |