Climate twins of Derby, CT
These are the US cities whose 12-month climate pattern most closely matches Derby'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: Derby vs its climate twin
Top match: Melrose, MA
| Month | Derby | Melrose | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 36.0°F | 18.4°F | 3.95 in | 37.6°F | 18.5°F | 3.86 in |
| February | 38.1°F | 18.9°F | 3.62 in | 40.2°F | 19.9°F | 3.62 in |
| March | 46.8°F | 27.4°F | 4.72 in | 47.8°F | 26.9°F | 4.89 in |
| April | 58.2°F | 37.5°F | 4.72 in | 59.9°F | 36.5°F | 4.34 in |
| May | 69.0°F | 47.2°F | 4.04 in | 69.9°F | 46.8°F | 3.81 in |
| June | 77.3°F | 57.9°F | 3.93 in | 78.1°F | 56.4°F | 4.21 in |
| July | 82.0°F | 63.1°F | 4.30 in | 83.8°F | 62.7°F | 4.01 in |
| August | 82.0°F | 62.1°F | 4.56 in | 82.2°F | 61.4°F | 3.54 in |
| September | 75.0°F | 53.6°F | 4.38 in | 74.6°F | 53.2°F | 3.93 in |
| October | 63.3°F | 41.2°F | 5.00 in | 63.5°F | 41.9°F | 4.76 in |
| November | 51.6°F | 32.0°F | 4.24 in | 53.1°F | 32.4°F | 4.01 in |
| December | 41.2°F | 23.3°F | 4.57 in | 42.6°F | 24.3°F | 5.02 in |
Cities that consider Derby their climate twin
These US cities have Derby in their top 3 most-similar list — meaning if you were to move from any of these places, Derby would feel familiar.
- Melrose, MA (ranks Derby #2)
- Weymouth Town, MA (ranks Derby #2)
- Quincy, MA (ranks Derby #2)
- Braintree Town, MA (ranks Derby #2)
- Randolph Town, MA (ranks Derby #2)
- Brockton, MA (ranks Derby #2)
- Bridgewater Town, MA (ranks Derby #2)
- Salem, MA (ranks Derby #2)
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 →