| | Owings Mills, MD | Largo, MD | United States |
| Rainfall | 44.2 | 43.8 | 38.1 |
| Snowfall | 20.5 | 13.5 | 27.8 |
| Precipitation Days | 115.6 | 106.6 | 106.2 |
| Sunny | 215 | 200 | 205 |
| Avg. July High | 86.8 | 87.8 | 85.8 |
| Avg. Jan. Low | 23.7 | 24.1 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
| UV Index | 4.1 | 4.3 | 4.3 |
| Elevation ft. | 499 | 171 | 2443 |