| | Colleyville, TX | Rowlett, TX | United States |
| Rainfall | 38 | 40.4 | 38.1 |
| Snowfall | 0.7 | 0.8 | 27.8 |
| Precipitation Days | 79 | 85.8 | 106.2 |
| Sunny | 235 | 230 | 205 |
| Avg. July High | 94.8 | 94.7 | 85.8 |
| Avg. Jan. Low | 34.9 | 35 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.1 | 7 |
| UV Index | 5.7 | 5.7 | 4.3 |
| Elevation ft. | 614 | 505 | 2443 |