| | Lake Zurich, IL | Johnston, IA | United States |
| Rainfall | 37.5 | 35.9 | 38.1 |
| Snowfall | 37.7 | 34.1 | 27.8 |
| Precipitation Days | 124.1 | 109 | 106.2 |
| Sunny | 185 | 199 | 205 |
| Avg. July High | 83.3 | 85.7 | 85.8 |
| Avg. Jan. Low | 12.3 | 12.5 | 21.7 |
| Comfort Index (higher=better) | 6.7 | 6.9 | 7 |
| UV Index | 3.7 | 4 | 4.3 |
| Elevation ft. | 873 | 830 | 2443 |