| | Rio Vista, CA | Valley Center, CA | United States |
| Rainfall | 20.3 | 14.6 | 38.1 |
| Snowfall | 0 | 0 | 27.8 |
| Precipitation Days | 57.9 | 38.8 | 106.2 |
| Sunny | 268 | 258 | 205 |
| Avg. July High | 91.2 | 88.1 | 85.8 |
| Avg. Jan. Low | 38.6 | 39.1 | 21.7 |
| Comfort Index (higher=better) | 8.4 | 8.7 | 7 |
| UV Index | 5.1 | 5.9 | 4.3 |
| Elevation ft. | 20 | 1312 | 2443 |