Climate twins of Nashua, NH
These are the US cities whose 12-month climate pattern most closely matches Nashua'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: Nashua vs its climate twin
Top match: Walden, NY
| Month | Nashua | Walden | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 34.5°F | 13.8°F | 3.00 in | 36.3°F | 15.5°F | 2.98 in |
| February | 37.5°F | 15.5°F | 3.07 in | 39.2°F | 17.4°F | 2.67 in |
| March | 45.3°F | 24.1°F | 4.11 in | 47.4°F | 25.8°F | 3.55 in |
| April | 58.4°F | 34.7°F | 3.91 in | 60.5°F | 36.5°F | 3.69 in |
| May | 69.4°F | 46.1°F | 3.63 in | 71.4°F | 47.2°F | 3.82 in |
| June | 78.7°F | 55.9°F | 4.19 in | 79.8°F | 56.5°F | 4.38 in |
| July | 84.7°F | 61.6°F | 3.63 in | 85.1°F | 60.9°F | 3.98 in |
| August | 82.7°F | 59.7°F | 3.71 in | 82.6°F | 59.4°F | 4.48 in |
| September | 75.2°F | 52.2°F | 4.15 in | 75.7°F | 51.3°F | 4.29 in |
| October | 62.3°F | 38.9°F | 4.66 in | 64.1°F | 39.6°F | 4.70 in |
| November | 50.5°F | 29.1°F | 3.74 in | 52.2°F | 30.7°F | 3.23 in |
| December | 39.6°F | 19.5°F | 4.45 in | 41.1°F | 22.6°F | 3.63 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 →