| | James Island, SC | Frederick, MD | United States |
| Rainfall | 48.2 | 42.5 | 38.1 |
| Snowfall | 0.4 | 23.1 | 27.8 |
| Precipitation Days | 105.6 | 107.2 | 106.2 |
| Sunny | 211 | 200 | 205 |
| Avg. July High | 89.8 | 87.7 | 85.8 |
| Avg. Jan. Low | 39.3 | 23.3 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.3 | 7 |
| UV Index | 5.1 | 4.2 | 4.3 |
| Elevation ft. | 12 | 282 | 2443 |