| | Hopkinton, MA | Williamstown, MA | United States |
| Rainfall | 49.1 | 44.4 | 38.1 |
| Snowfall | 44.6 | 63.3 | 27.8 |
| Precipitation Days | 116.7 | 129.5 | 106.2 |
| Sunny | 200 | 185 | 205 |
| Avg. July High | 83.2 | 79.5 | 85.8 |
| Avg. Jan. Low | 15 | 12.1 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 6.5 | 7 |
| UV Index | 3.5 | 3.3 | 4.3 |
| Elevation ft. | 436 | 682 | 2443 |