| | Sterling, VA | Tappahannock, VA | United States |
| Rainfall | 42 | 44 | 38 |
| Snowfall | 22 | 12 | 28 |
| Precipitation | 116 | 116 | 106 |
| Sunny | 197 | 205 | 205 |
| Avg. July High | 86 | 91 | 86 |
| Avg. Jan. Low | 24 | 27 | 22 |
| Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
| UV Index | 4 | 4.3 | 4.3 |
| Elevation | 292 | 23 | 2443 |