| | Friendship, MD | Waltham, MA | United States |
| Rainfall | 44.1 | 47.7 | 38.1 |
| Snowfall | 15.7 | 50.2 | 27.8 |
| Precipitation Days | 106.6 | 130.6 | 106.2 |
| Sunny | 212 | 197 | 205 |
| Avg. July High | 86.9 | 82.9 | 85.8 |
| Avg. Jan. Low | 24.7 | 17.1 | 21.7 |
| Comfort Index (higher=better) | 7.4 | 6.9 | 7 |
| UV Index | 4 | 3.5 | 4.3 |
| Elevation ft. | 144 | 66 | 2443 |