| | Dedham, MA | Arlington, MA | United States |
| Rainfall | 48.6 | 48.2 | 38.1 |
| Snowfall | 46.7 | 52.6 | 27.8 |
| Precipitation Days | 126.7 | 134.3 | 106.2 |
| Sunny | 201 | 200 | 205 |
| Avg. July High | 83.1 | 82.4 | 85.8 |
| Avg. Jan. Low | 17.5 | 18.3 | 21.7 |
| Comfort Index (higher=better) | 7 | 6.9 | 7 |
| UV Index | 3.5 | 3.5 | 4.3 |
| Elevation ft. | 108 | 69 | 2443 |