| Great Falls, VA | Naperville, IL | United States |
Rainfall | 42 | 39 | 38 |
Snowfall | 22 | 29 | 28 |
Precipitation | 116 | 120 | 106 |
Sunny | 196 | 189 | 205 |
Avg. July High | 86 | 84 | 86 |
Avg. Jan. Low | 24 | 15 | 22 |
Comfort Index (higher=better) | 7.3 | 6.9 | 7 |
UV Index | 4 | 3.4 | 4.3 |
Elevation | 344 | 709 | 2443 |