| | Kettering, MD | Fort Washington, MD | United States |
| Rainfall | 43.8 | 42.6 | 38.1 |
| Snowfall | 13.5 | 14.1 | 27.8 |
| Precipitation Days | 106.6 | 112.7 | 106.2 |
| Sunny | 203 | 201 | 205 |
| Avg. July High | 87.8 | 88 | 85.8 |
| Avg. Jan. Low | 24.1 | 26.4 | 21.7 |
| Comfort Index (higher=better) | 7.3 | 7.4 | 7 |
| UV Index | 4.3 | 4.3 | 4.3 |
| Elevation ft. | 135 | 108 | 2443 |