| | Tarrytown, NY | Perryman, MD | United States |
| Rainfall | 50.1 | 46.6 | 38.1 |
| Snowfall | 29.8 | 14.3 | 27.8 |
| Precipitation Days | 119.5 | 120.2 | 106.2 |
| Sunny | 200 | 208 | 205 |
| Avg. July High | 80.8 | 88.2 | 85.8 |
| Avg. Jan. Low | 18 | 24.6 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 7.2 | 7 |
| UV Index | 3.6 | 3.9 | 4.3 |
| Elevation ft. | 121 | 43 | 2443 |