| | Griswold, CT | Norwich, CT | United States |
| Rainfall | 50.5 | 50.7 | 38.1 |
| Snowfall | 32.3 | 27.4 | 27.8 |
| Precipitation Days | 116.6 | 119.3 | 106.2 |
| Sunny | 204 | 200 | 205 |
| Avg. July High | 82.6 | 81.1 | 85.8 |
| Avg. Jan. Low | 16.4 | 20.4 | 21.7 |
| Comfort Index (higher=better) | 7 | 7.1 | 7 |
| UV Index | 3.3 | 3.3 | 4.3 |
| Elevation ft. | 223 | 20 | 2443 |