| | Needham, MA | Merrimack, NH | United States |
| Rainfall | 48.7 | 46.1 | 38.1 |
| Snowfall | 50.1 | 57.5 | 27.8 |
| Precipitation Days | 130.7 | 125.6 | 106.2 |
| Sunny | 201 | 199 | 205 |
| Avg. July High | 82.8 | 82.5 | 85.8 |
| Avg. Jan. Low | 17.4 | 12.8 | 21.7 |
| Comfort Index (higher=better) | 6.9 | 6.7 | 7 |
| UV Index | 3.5 | 3.2 | 4.3 |
| Elevation ft. | 174 | 154 | 2443 |