| | Glen Burnie, MD | Naperville, IL | United States |
| Rainfall | 42 | 38.6 | 38.1 |
| Snowfall | 14.1 | 28.7 | 27.8 |
| Precipitation Days | 112.9 | 120.3 | 106.2 |
| Sunny | 211 | 189 | 205 |
| Avg. July High | 89.2 | 83.8 | 85.8 |
| Avg. Jan. Low | 28.1 | 15.1 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 6.9 | 7 |
| UV Index | 4 | 3.4 | 4.3 |
| Elevation ft. | 56 | 709 | 2443 |