| | Rossmoor, CA | Orinda, CA | United States |
| Rainfall | 13.4 | 26 | 38.1 |
| Snowfall | 0 | 0 | 27.8 |
| Precipitation Days | 32.2 | 67.7 | 106.2 |
| Sunny | 274 | 261 | 205 |
| Avg. July High | 81.1 | 77.5 | 85.8 |
| Avg. Jan. Low | 45.9 | 42.4 | 21.7 |
| Comfort Index (higher=better) | 9.3 | 8.6 | 7 |
| UV Index | 5.9 | 5.4 | 4.3 |
| Elevation ft. | 13 | 495 | 2443 |