Climate twins of Manchester, IL
These are the US cities whose 12-month climate pattern most closely matches Manchester'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: Manchester vs its climate twin
Top match: Riley, IN
| Month | Manchester | Riley | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 35.4°F | 18.4°F | 2.06 in | 36.7°F | 20.7°F | 2.60 in |
| February | 40.5°F | 21.9°F | 2.05 in | 41.6°F | 24.1°F | 2.02 in |
| March | 51.7°F | 31.5°F | 2.91 in | 52.8°F | 32.8°F | 2.92 in |
| April | 64.1°F | 41.9°F | 4.41 in | 64.9°F | 42.9°F | 4.71 in |
| May | 73.9°F | 53.2°F | 4.81 in | 74.6°F | 53.4°F | 4.71 in |
| June | 82.5°F | 62.3°F | 4.67 in | 83.3°F | 62.2°F | 4.64 in |
| July | 85.6°F | 65.7°F | 3.87 in | 85.9°F | 64.8°F | 4.34 in |
| August | 84.4°F | 63.6°F | 3.35 in | 84.6°F | 62.5°F | 2.99 in |
| September | 78.9°F | 55.1°F | 2.99 in | 79.0°F | 54.2°F | 2.93 in |
| October | 66.8°F | 43.4°F | 3.02 in | 66.7°F | 43.0°F | 3.44 in |
| November | 52.3°F | 32.6°F | 3.11 in | 52.6°F | 33.7°F | 3.05 in |
| December | 40.5°F | 23.7°F | 2.33 in | 41.1°F | 25.9°F | 2.49 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 →