| | Rossville, MD | Dundalk, MD | United States |
| Rainfall | 41.9 | 41.7 | 38.1 |
| Snowfall | 15.5 | 14.8 | 27.8 |
| Precipitation Days | 113 | 112.6 | 106.2 |
| Sunny | 215 | 213 | 205 |
| Avg. July High | 88.5 | 89.5 | 85.8 |
| Avg. Jan. Low | 28.3 | 28.7 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
| UV Index | 4.1 | 4.1 | 4.3 |
| Elevation ft. | 39 | 16 | 2443 |