| Herndon, VA | Portsmouth, NH | United States |
Rainfall | 42.9 | 50.1 | 38.1 |
Snowfall | 21.5 | 53.2 | 27.8 |
Precipitation Days | 119.5 | 118.3 | 106.2 |
Sunny | 201 | 198 | 205 |
Avg. July High | 85.8 | 81.9 | 85.8 |
Avg. Jan. Low | 23.5 | 13.8 | 21.7 |
Comfort Index (higher=better) | 7.3 | 6.8 | 7 |
UV Index | 4 | 3.4 | 4.3 |
Elevation ft. | 361 | 20 | 2443 |