Climate twins of Somersworth, NH
These are the US cities whose 12-month climate pattern most closely matches Somersworth's. Each "twin" must be at least 140 miles away to avoid trivial near-neighbor matches. Similarity is computed across all 24 monthly metrics (12 average temperatures + 12 average precipitations), normalized so temperature and precipitation contribute equally.
Side-by-side: Somersworth vs its climate twin
Top match: Tonawanda, NY
| Month | Somersworth | Tonawanda | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.6°F | 15.4°F | 2.53 in | 33.2°F | 16.7°F | 3.19 in |
| February | 35.4°F | 17.0°F | 2.22 in | 35.5°F | 16.9°F | 2.44 in |
| March | 43.5°F | 24.7°F | 3.72 in | 44.1°F | 23.8°F | 2.94 in |
| April | 56.7°F | 34.7°F | 3.67 in | 56.9°F | 33.5°F | 3.64 in |
| May | 67.4°F | 44.8°F | 3.52 in | 69.8°F | 44.6°F | 3.38 in |
| June | 77.0°F | 54.2°F | 3.86 in | 78.8°F | 55.0°F | 3.30 in |
| July | 81.9°F | 59.6°F | 3.52 in | 82.8°F | 59.1°F | 3.46 in |
| August | 80.6°F | 57.9°F | 3.17 in | 81.5°F | 57.8°F | 3.10 in |
| September | 72.6°F | 50.3°F | 3.43 in | 74.3°F | 50.4°F | 3.90 in |
| October | 60.3°F | 39.4°F | 4.39 in | 61.2°F | 40.4°F | 3.94 in |
| November | 48.0°F | 30.7°F | 3.89 in | 49.2°F | 30.7°F | 3.46 in |
| December | 37.4°F | 21.9°F | 3.30 in | 38.0°F | 23.1°F | 3.39 in |
How this is computed
Each city is represented by a 24-dimensional vector: 12 monthly average temperatures and 12 monthly average precipitations. Each dimension is z-score normalized across the population of US cities, so that temperature variance and precipitation variance contribute proportionally. Distance between cities is Euclidean. We filter out cities within 2° latitude/longitude (~140 miles) so that "twins" mean climatically similar but geographically distinct — not just the neighboring town. Full methodology →