| Alton, IL | Crystal Lake, IL | United States |
Rainfall | 42 | 37 | 38 |
Snowfall | 16 | 35 | 28 |
Precipitation | 104 | 114 | 106 |
Sunny | 200 | 186 | 205 |
Avg. July High | 89 | 82 | 86 |
Avg. Jan. Low | 23 | 13 | 22 |
Comfort Index (higher=better) | 7.2 | 6.8 | 7 |
UV Index | 4.1 | 3.4 | 4.3 |
Elevation | 495 | 915 | 2443 |