| | Montgomery Village, MD | Barrington, IL | United States |
| Rainfall | 42.5 | 37.6 | 38.1 |
| Snowfall | 24.5 | 37.5 | 27.8 |
| Precipitation Days | 111.4 | 124.1 | 106.2 |
| Sunny | 200 | 191 | 205 |
| Avg. July High | 84.9 | 83.4 | 85.8 |
| Avg. Jan. Low | 25.5 | 12.3 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 6.7 | 7 |
| UV Index | 4.1 | 3.6 | 4.3 |
| Elevation ft. | 381 | 827 | 2443 |