| | Harpers Ferry, WV | Hellertown, PA | United States |
| Rainfall | 40.3 | 48.2 | 38.1 |
| Snowfall | 19.8 | 29.5 | 27.8 |
| Precipitation Days | 114.8 | 113.6 | 106.2 |
| Sunny | 201 | 207 | 205 |
| Avg. July High | 86.1 | 83.9 | 85.8 |
| Avg. Jan. Low | 21.3 | 18.4 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.1 | 7 |
| UV Index | 3.9 | 3.7 | 4.3 |
| Elevation ft. | 489 | 285 | 2443 |