| Naperville, IL | Manassas, VA | United States |
Rainfall | 39 | 43 | 38 |
Snowfall | 29 | 22 | 28 |
Precipitation | 120 | 120 | 106 |
Sunny | 189 | 196 | 205 |
Avg. July High | 84 | 88 | 86 |
Avg. Jan. Low | 15 | 24 | 22 |
Comfort Index (higher=better) | 6.9 | 7.3 | 7 |
UV Index | 3.4 | 4.1 | 4.3 |
Elevation | 709 | 308 | 2443 |