| | Roseville, CA | Colusa, CA | United States |
| Rainfall | 21.2 | 24.1 | 38.1 |
| Snowfall | 0 | 0.1 | 27.8 |
| Precipitation Days | 60.2 | 58.7 | 106.2 |
| Sunny | 247 | 264 | 205 |
| Avg. July High | 94 | 94.7 | 85.8 |
| Avg. Jan. Low | 39 | 38.4 | 21.7 |
| Comfort Index (higher=better) | 8.2 | 8.1 | 7 |
| UV Index | 4.8 | 5.1 | 4.3 |
| Elevation ft. | 164 | 49 | 2443 |