| | Terrell, TX | Forney, TX | United States |
| Rainfall | 41.8 | 41.6 | 38.1 |
| Snowfall | 0.6 | 0.6 | 27.8 |
| Precipitation Days | 67.2 | 74 | 106.2 |
| Sunny | 236 | 232 | 205 |
| Avg. July High | 94.2 | 94.7 | 85.8 |
| Avg. Jan. Low | 33.9 | 33.7 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.2 | 7 |
| UV Index | 5.5 | 5.5 | 4.3 |
| Elevation ft. | 509 | 472 | 2443 |