| | Martinez, CA | Arnold, CA | United States |
| Rainfall | 18.3 | 49.5 | 38.1 |
| Snowfall | 0 | 73 | 27.8 |
| Precipitation Days | 61.3 | 77.4 | 106.2 |
| Sunny | 265 | 264 | 205 |
| Avg. July High | 87.9 | 84.7 | 85.8 |
| Avg. Jan. Low | 38.7 | 31.3 | 21.7 |
| Comfort Index (higher=better) | 8.5 | 7.4 | 7 |
| UV Index | 5.4 | 5.3 | 4.3 |
| Elevation ft. | 23 | 4009 | 2443 |