Climate twins of Haverhill, MA
These are the US cities whose 12-month climate pattern most closely matches Haverhill'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: Haverhill vs its climate twin
Top match: Shelton, CT
| Month | Haverhill | Shelton | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 34.9°F | 16.2°F | 3.53 in | 36.0°F | 18.4°F | 3.95 in |
| February | 37.6°F | 16.9°F | 3.59 in | 38.1°F | 18.9°F | 3.62 in |
| March | 45.0°F | 24.3°F | 4.80 in | 46.8°F | 27.4°F | 4.72 in |
| April | 57.0°F | 34.3°F | 4.29 in | 58.2°F | 37.5°F | 4.72 in |
| May | 67.5°F | 44.8°F | 4.08 in | 69.0°F | 47.2°F | 4.04 in |
| June | 76.4°F | 54.4°F | 4.23 in | 77.3°F | 57.9°F | 3.93 in |
| July | 82.4°F | 61.1°F | 3.55 in | 82.0°F | 63.1°F | 4.30 in |
| August | 81.1°F | 58.8°F | 3.76 in | 82.0°F | 62.1°F | 4.56 in |
| September | 73.5°F | 51.1°F | 4.01 in | 75.0°F | 53.6°F | 4.38 in |
| October | 61.8°F | 39.6°F | 5.32 in | 63.3°F | 41.2°F | 5.00 in |
| November | 50.5°F | 30.6°F | 3.90 in | 51.6°F | 32.0°F | 4.24 in |
| December | 40.2°F | 22.3°F | 4.52 in | 41.2°F | 23.3°F | 4.57 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 →