| | McCormick, SC | Seneca, SC | United States |
| Rainfall | 45.4 | 53.4 | 38.1 |
| Snowfall | 0.6 | 2.3 | 27.8 |
| Precipitation Days | 95.1 | 111 | 106.2 |
| Sunny | 220 | 220 | 205 |
| Avg. July High | 92.3 | 90.2 | 85.8 |
| Avg. Jan. Low | 31.4 | 31.1 | 21.7 |
| Comfort Index (higher=better) | 7.4 | 7.5 | 7 |
| UV Index | 5 | 4.6 | 4.3 |
| Elevation ft. | 535 | 951 | 2443 |