| | Altadena, CA | Alpine, CA | United States |
| Rainfall | 22.5 | 16.2 | 38.1 |
| Snowfall | 0 | 0.1 | 27.8 |
| Precipitation Days | 37.4 | 44.3 | 106.2 |
| Sunny | 287 | 262 | 205 |
| Avg. July High | 86.4 | 87.8 | 85.8 |
| Avg. Jan. Low | 46.7 | 40 | 21.7 |
| Comfort Index (higher=better) | 9.1 | 8.7 | 7 |
| UV Index | 6.2 | 5.9 | 4.3 |
| Elevation ft. | 1358 | 1834 | 2443 |