| | Loudon, TN | Irmo, SC | United States |
| Rainfall | 53.2 | 44.8 | 38.1 |
| Snowfall | 4.8 | 0.9 | 27.8 |
| Precipitation Days | 121.5 | 103.3 | 106.2 |
| Sunny | 204 | 222 | 205 |
| Avg. July High | 88.5 | 93 | 85.8 |
| Avg. Jan. Low | 27.7 | 30.3 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.2 | 7 |
| UV Index | 4.6 | 4.9 | 4.3 |
| Elevation ft. | 837 | 358 | 2443 |