| | Cottleville, MO | Arnold, MO | United States |
| Rainfall | 42.6 | 43.9 | 38.1 |
| Snowfall | 12.9 | 12.3 | 27.8 |
| Precipitation Days | 107.1 | 96.8 | 106.2 |
| Sunny | 199 | 203 | 205 |
| Avg. July High | 88.1 | 88.3 | 85.8 |
| Avg. Jan. Low | 20.7 | 22.6 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.3 | 7 |
| UV Index | 4.4 | 4.2 | 4.3 |
| Elevation ft. | 495 | 600 | 2443 |