Maryland frost dates: G
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Gaithersburg | Apr 1 | Nov 6 | 219 d | 7b |
| Galena | Apr 3 | Nov 5 | 216 d | 7b |
| Galesville | Mar 23 | Nov 20 | 242 d | 8a |
| Gambrills | Apr 22 | Oct 22 | 183 d | 7b |
| Garrett Park | Apr 1 | Nov 6 | 219 d | 7b |
| Georgetown | Apr 3 | Nov 5 | 216 d | 7b |
| Germantown | Apr 1 | Nov 6 | 219 d | 7b |
| Gibson Island | Mar 23 | Nov 20 | 242 d | 8a |
| Girdletree | Apr 10 | Oct 31 | 204 d | 7b |
| Glen Arm | Apr 2 | Nov 7 | 219 d | 7b |
| Glen Burnie | Apr 10 | Oct 31 | 204 d | 8a |
| Glen Echo | Apr 9 | Oct 31 | 205 d | 7b |
| Glenelg | Apr 14 | Oct 29 | 198 d | 7b |
| Glenn Dale | Apr 22 | Oct 22 | 183 d | 7b |
| Glenwood | Apr 14 | Oct 29 | 198 d | 7b |
| Glyndon | Apr 2 | Nov 7 | 219 d | 7a |
| Goldsboro | Apr 4 | Nov 4 | 214 d | 7b |
| Grantsville | May 12 | Oct 5 | 146 d | 6a |
| Grasonville | Mar 29 | Nov 12 | 228 d | 8a |
| Great Mills | Mar 22 | Nov 26 | 249 d | 8a |
| Greenbelt | Apr 10 | Nov 1 | 205 d | 7b |
| Greensboro | Apr 11 | Oct 30 | 202 d | 7b |
| Gunpowder | Apr 10 | Oct 30 | 203 d | 8a |
| Gwynn Oak | Apr 2 | Nov 7 | 219 d | 7b |