| | North Potomac, MD | South Kensington, MD | United States |
| Rainfall | 41.9 | 42.6 | 38.1 |
| Snowfall | 19.1 | 14.9 | 27.8 |
| Precipitation Days | 113.8 | 114.3 | 106.2 |
| Sunny | 201 | 201 | 205 |
| Avg. July High | 84.9 | 87.1 | 85.8 |
| Avg. Jan. Low | 24.6 | 25.4 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.3 | 7 |
| UV Index | 4.1 | 4.1 | 4.3 |
| Elevation ft. | 256 | 282 | 2443 |