| | Piedmont, CA | Darien, CT | United States |
| Rainfall | 25.4 | 50.8 | 38.1 |
| Snowfall | 0 | 29.9 | 27.8 |
| Precipitation Days | 67.3 | 123.7 | 106.2 |
| Sunny | 264 | 175 | 205 |
| Avg. July High | 72.4 | 83.6 | 85.8 |
| Avg. Jan. Low | 44.3 | 21.1 | 21.7 |
| Comfort Index (higher=better) | 8.7 | 7.1 | 7 |
| UV Index | 5.4 | 3.4 | 4.3 |
| Elevation ft. | 331 | 49 | 2443 |