| | Preston, CT | Watertown, CT | United States |
| Rainfall | 51.2 | 51.9 | 38.1 |
| Snowfall | 29.7 | 40.3 | 27.8 |
| Precipitation Days | 116.8 | 120.1 | 106.2 |
| Sunny | 207 | 204 | 205 |
| Avg. July High | 82.3 | 82.5 | 85.8 |
| Avg. Jan. Low | 19.4 | 14.1 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 6.9 | 7 |
| UV Index | 3.3 | 3.4 | 4.3 |
| Elevation ft. | 200 | 581 | 2443 |