| Portola Valley, CA | Atherton, CA | United States |
Rainfall | 31 | 17 | 38 |
Snowfall | 0 | 0 | 28 |
Precipitation | 73 | 61 | 106 |
Sunny | 262 | 261 | 205 |
Avg. July High | 77 | 80 | 86 |
Avg. Jan. Low | 41 | 41 | 22 |
Comfort Index (higher=better) | 8.4 | 8.7 | 7 |
UV Index | 4.9 | 4.9 | 4.3 |
Elevation | 459 | 59 | 2443 |