| | Griffith, IN | Aurora, IL | United States |
| Rainfall | 38.8 | 38.2 | 38.1 |
| Snowfall | 32.3 | 28.2 | 27.8 |
| Precipitation Days | 116.2 | 119.6 | 106.2 |
| Sunny | 188 | 192 | 205 |
| Avg. July High | 83.7 | 83.8 | 85.8 |
| Avg. Jan. Low | 17.7 | 14.8 | 21.7 |
| Comfort Index (higher=better) | 7 | 6.9 | 7 |
| UV Index | 3.7 | 3.5 | 4.3 |
| Elevation ft. | 630 | 679 | 2443 |