| | Winthrop Harbor, IL | Lake Forest, IL | United States |
| Rainfall | 35.7 | 35.4 | 38.1 |
| Snowfall | 40.2 | 38 | 27.8 |
| Precipitation Days | 115.3 | 120.5 | 106.2 |
| Sunny | 191 | 190 | 205 |
| Avg. July High | 80.3 | 82.4 | 85.8 |
| Avg. Jan. Low | 15.7 | 15.9 | 21.7 |
| Comfort Index (higher=better) | 6.8 | 6.9 | 7 |
| UV Index | 3.7 | 3.7 | 4.3 |
| Elevation ft. | 633 | 686 | 2443 |