| | Ontario, CA | Downey, CA | United States |
| Rainfall | 15.7 | 14.1 | 38.1 |
| Snowfall | 0 | 0 | 27.8 |
| Precipitation Days | 30.5 | 28.2 | 106.2 |
| Sunny | 279 | 287 | 205 |
| Avg. July High | 91.9 | 84.6 | 85.8 |
| Avg. Jan. Low | 42.6 | 46 | 21.7 |
| Comfort Index (higher=better) | 8.8 | 9.3 | 7 |
| UV Index | 5.7 | 6.2 | 4.3 |
| Elevation ft. | 1004 | 118 | 2443 |