| | Rockdale, TX | Coppell, TX | United States |
| Rainfall | 35.7 | 37.6 | 38.1 |
| Snowfall | 0.1 | 1 | 27.8 |
| Precipitation Days | 78.1 | 77.3 | 106.2 |
| Sunny | 225 | 229 | 205 |
| Avg. July High | 92.3 | 95.3 | 85.8 |
| Avg. Jan. Low | 36 | 35.4 | 21.7 |
| Comfort Index (higher=better) | 7.4 | 7 | 7 |
| UV Index | 6.1 | 5.7 | 4.3 |
| Elevation ft. | 466 | 518 | 2443 |