| | Union City, CA | Oakley, CA | United States |
| Rainfall | 16.6 | 14.1 | 38.1 |
| Snowfall | 0 | 0 | 27.8 |
| Precipitation Days | 64.1 | 56.6 | 106.2 |
| Sunny | 265 | 259 | 205 |
| Avg. July High | 76.1 | 90.5 | 85.8 |
| Avg. Jan. Low | 42.3 | 39.3 | 21.7 |
| Comfort Index (higher=better) | 8.8 | 8.5 | 7 |
| UV Index | 5.4 | 5.4 | 4.3 |
| Elevation ft. | 66 | 20 | 2443 |