| | Somerton, AZ | Jarrettsville, MD | United States |
| Rainfall | 3.5 | 46.4 | 38.1 |
| Snowfall | 0 | 28.5 | 27.8 |
| Precipitation Days | 18.1 | 121.1 | 106.2 |
| Sunny | 311 | 208 | 205 |
| Avg. July High | 106.8 | 86.6 | 85.8 |
| Avg. Jan. Low | 45.4 | 23.5 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.2 | 7 |
| UV Index | 6.4 | 3.9 | 4.3 |
| Elevation ft. | 105 | 646 | 2443 |