| | Lynnfield, MA | North Potomac, MD | United States |
| Rainfall | 49 | 42 | 38 |
| Snowfall | 48 | 19 | 28 |
| Precipitation | 127 | 114 | 106 |
| Sunny | 201 | 201 | 205 |
| Avg. July High | 82 | 85 | 86 |
| Avg. Jan. Low | 18 | 25 | 22 |
| Comfort Index (higher=better) | 6.9 | 7.3 | 7 |
| UV Index | 3.2 | 4.1 | 4.3 |
| Elevation | 89 | 256 | 2443 |