| | Charleston, SC | Ontario, CA | United States |
| Rainfall | 48.3 | 15.7 | 38.1 |
| Snowfall | 0.4 | 0 | 27.8 |
| Precipitation Days | 105.9 | 30.5 | 106.2 |
| Sunny | 209 | 279 | 205 |
| Avg. July High | 89.9 | 91.9 | 85.8 |
| Avg. Jan. Low | 39.3 | 42.6 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 8.8 | 7 |
| UV Index | 5.1 | 5.7 | 4.3 |
| Elevation ft. | 10 | 1004 | 2443 |