| | Frederick, MD | Short Pump, VA | United States |
| Rainfall | 42.5 | 43.3 | 38.1 |
| Snowfall | 23.1 | 12.8 | 27.8 |
| Precipitation Days | 107.2 | 106.7 | 106.2 |
| Sunny | 200 | 206 | 205 |
| Avg. July High | 87.7 | 88 | 85.8 |
| Avg. Jan. Low | 23.3 | 26.5 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.4 | 7 |
| UV Index | 4.2 | 4.5 | 4.3 |
| Elevation ft. | 282 | 292 | 2443 |