| | Mount Vernon, WA | Rowlett, TX | United States |
| Rainfall | 38.1 | 40.4 | 38.1 |
| Snowfall | 5 | 0.8 | 27.8 |
| Precipitation Days | 165 | 85.8 | 106.2 |
| Sunny | 156 | 230 | 205 |
| Avg. July High | 72.8 | 94.7 | 85.8 |
| Avg. Jan. Low | 35.7 | 35 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.1 | 7 |
| UV Index | 2.6 | 5.7 | 4.3 |
| Elevation ft. | 98 | 505 | 2443 |