| Union City, CA | San Francisco, CA | United States |
Rainfall | 17 | 25 | 38 |
Snowfall | 0 | 0 | 28 |
Precipitation | 64 | 72 | 106 |
Sunny | 265 | 259 | 205 |
Avg. July High | 76 | 67 | 86 |
Avg. Jan. Low | 42 | 46 | 22 |
Comfort Index (higher=better) | 8.8 | 8.5 | 7 |
UV Index | 5.4 | 5.4 | 4.3 |
Elevation | 66 | 52 | 2443 |