| | Atherton, CA | Portland, OR | United States |
| Rainfall | 17.1 | 42.8 | 38.1 |
| Snowfall | 0 | 2.6 | 27.8 |
| Precipitation Days | 60.6 | 155.9 | 106.2 |
| Sunny | 261 | 144 | 205 |
| Avg. July High | 79.7 | 80.5 | 85.8 |
| Avg. Jan. Low | 40.5 | 36.4 | 21.7 |
| Comfort Index (higher=better) | 8.7 | 7.5 | 7 |
| UV Index | 4.9 | 3 | 4.3 |
| Elevation ft. | 59 | 33 | 2443 |