| | Charleston, SC | Harleysville, PA | United States |
| Rainfall | 48.3 | 47.6 | 38.1 |
| Snowfall | 0.4 | 21.3 | 27.8 |
| Precipitation Days | 105.9 | 116.9 | 106.2 |
| Sunny | 209 | 203 | 205 |
| Avg. July High | 89.9 | 85.6 | 85.8 |
| Avg. Jan. Low | 39.3 | 21.6 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
| UV Index | 5.1 | 4.1 | 4.3 |
| Elevation ft. | 10 | 266 | 2443 |