| | Gettysburg, PA | Boonsboro, MD | United States |
| Rainfall | 42.9 | 41.7 | 38.1 |
| Snowfall | 25.1 | 19.8 | 27.8 |
| Precipitation Days | 119.1 | 114.6 | 106.2 |
| Sunny | 195 | 193 | 205 |
| Avg. July High | 85.5 | 86.5 | 85.8 |
| Avg. Jan. Low | 20.6 | 21 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.3 | 7 |
| UV Index | 4.2 | 3.9 | 4.3 |
| Elevation ft. | 535 | 545 | 2443 |