| | Mission, TX | Donna, TX | United States |
| Rainfall | 21.4 | 22.9 | 38.1 |
| Snowfall | 0.1 | 0 | 27.8 |
| Precipitation Days | 50.5 | 59.4 | 106.2 |
| Sunny | 231 | 227 | 205 |
| Avg. July High | 97.5 | 96.1 | 85.8 |
| Avg. Jan. Low | 48.7 | 48.8 | 21.7 |
| Comfort Index (higher=better) | 6.2 | 6.3 | 7 |
| UV Index | 6.1 | 6.1 | 4.3 |
| Elevation ft. | 141 | 92 | 2443 |