| | East Lyme, CT | Madison, CT | United States |
| Rainfall | 50.1 | 48.4 | 38.1 |
| Snowfall | 26.1 | 31.6 | 27.8 |
| Precipitation Days | 117.9 | 111.3 | 106.2 |
| Sunny | 196 | 199 | 205 |
| Avg. July High | 80.7 | 83.6 | 85.8 |
| Avg. Jan. Low | 21 | 19.6 | 21.7 |
| Comfort Index (higher=better) | 7.1 | 7.2 | 7 |
| UV Index | 3.3 | 3.5 | 4.3 |
| Elevation ft. | 115 | 20 | 2443 |