| | Port Gibson, MS | Grayson, GA | United States |
| Rainfall | 57.6 | 52.2 | 38.1 |
| Snowfall | 0.3 | 0.9 | 27.8 |
| Precipitation Days | 100.8 | 102.1 | 106.2 |
| Sunny | 211 | 221 | 205 |
| Avg. July High | 91.5 | 89.2 | 85.8 |
| Avg. Jan. Low | 34.3 | 30.9 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.5 | 7 |
| UV Index | 5.3 | 5 | 4.3 |
| Elevation ft. | 118 | 1096 | 2443 |