| Castro Valley, CA | Fairfield, CA | United States |
Rainfall | 21.3 | 24.8 | 38.1 |
Snowfall | 0 | 0 | 27.8 |
Precipitation Days | 66 | 64.7 | 106.2 |
Sunny | 261 | 258 | 205 |
Avg. July High | 75.6 | 89.8 | 85.8 |
Avg. Jan. Low | 41.6 | 38.7 | 21.7 |
Comfort Index (higher=better) | 8.6 | 8.3 | 7 |
UV Index | 5.4 | 5.1 | 4.3 |
Elevation ft. | 161 | 13 | 2443 |