| | Chapel Hill, NC | Mill Valley, CA | United States |
| Rainfall | 46.3 | 40.6 | 38.1 |
| Snowfall | 3.8 | 0 | 27.8 |
| Precipitation Days | 113.5 | 78.1 | 106.2 |
| Sunny | 216 | 255 | 205 |
| Avg. July High | 88.8 | 76.5 | 85.8 |
| Avg. Jan. Low | 29.3 | 42.9 | 21.7 |
| Comfort Index (higher=better) | 7.5 | 8.4 | 7 |
| UV Index | 4.5 | 5.2 | 4.3 |
| Elevation ft. | 486 | 82 | 2443 |