| Boulder, CO | River Forest, IL | United States |
Rainfall | 18 | 38 | 38 |
Snowfall | 71 | 37 | 28 |
Precipitation | 88 | 125 | 106 |
Sunny | 245 | 189 | 205 |
Avg. July High | 88 | 84 | 86 |
Avg. Jan. Low | 19 | 18 | 22 |
Comfort Index (higher=better) | 7.1 | 6.9 | 7 |
UV Index | 5.8 | 3.6 | 4.3 |
Elevation | 5328 | 630 | 2443 |