Idaho frost dates: G
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Garden City | May 17 | Oct 12 | 148 d | 7a |
| Garden Valley | Jun 1 | Sep 10 | 101 d | 6b |
| Genesee | frost any month | 7a | ||
| Geneva | Jun 17 | Sep 3 | 78 d | 5b |
| Georgetown | Jun 17 | Sep 3 | 78 d | 5b |
| Gibbonsville | Jun 1 | Sep 17 | 108 d | 5b |
| Glenns Ferry | May 1 | Oct 3 | 155 d | 7a |
| Gooding | May 3 | Oct 1 | 151 d | 6b |
| Grace | May 29 | Sep 17 | 111 d | 5b |
| Grand View | Apr 28 | Oct 6 | 161 d | 7a |
| Grangeville | May 9 | Oct 3 | 147 d | 6b |
| Greencreek | May 6 | Oct 13 | 160 d | 6b |
| Greenleaf | Apr 24 | Oct 9 | 168 d | 7a |