| Chantilly, VA | Frederick, MD | United States |
Rainfall | 43 | 43 | 38 |
Snowfall | 22 | 23 | 28 |
Precipitation | 120 | 107 | 106 |
Sunny | 197 | 200 | 205 |
Avg. July High | 86 | 88 | 86 |
Avg. Jan. Low | 24 | 23 | 22 |
Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
UV Index | 4 | 4.2 | 4.3 |
Elevation | 325 | 282 | 2443 |