| | Holden, MA | Poolesville, MD | United States |
| Rainfall | 47.4 | 42 | 38.1 |
| Snowfall | 59.3 | 20.2 | 27.8 |
| Precipitation Days | 130.4 | 116.1 | 106.2 |
| Sunny | 197 | 203 | 205 |
| Avg. July High | 79.5 | 86.4 | 85.8 |
| Avg. Jan. Low | 14.2 | 24.6 | 21.7 |
| Comfort Index (higher=better) | 6.6 | 7.3 | 7 |
| UV Index | 3.3 | 4.1 | 4.3 |
| Elevation ft. | 817 | 410 | 2443 |