| | Ellicott City, MD | Timonium, MD | United States |
| Rainfall | 45.2 | 45.7 | 38.1 |
| Snowfall | 17.6 | 20.5 | 27.8 |
| Precipitation Days | 114.3 | 122 | 106.2 |
| Sunny | 206 | 213 | 205 |
| Avg. July High | 87.9 | 87.1 | 85.8 |
| Avg. Jan. Low | 23.9 | 24.8 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
| UV Index | 3.9 | 4.1 | 4.3 |
| Elevation ft. | 154 | 407 | 2443 |