Climate twins of Decatur, MI
These are the US cities whose 12-month climate pattern most closely matches Decatur'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: Decatur vs its climate twin
Top match: Schoharie, NY
| Month | Decatur | Schoharie | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.1°F | 16.2°F | 3.10 in | 33.0°F | 13.0°F | 2.76 in |
| February | 34.2°F | 17.6°F | 2.41 in | 36.8°F | 13.6°F | 2.31 in |
| March | 44.4°F | 25.2°F | 2.44 in | 46.3°F | 22.0°F | 3.31 in |
| April | 57.4°F | 35.5°F | 3.69 in | 59.6°F | 33.7°F | 3.41 in |
| May | 68.6°F | 47.1°F | 4.19 in | 71.6°F | 44.7°F | 3.60 in |
| June | 78.0°F | 56.9°F | 4.26 in | 78.5°F | 54.6°F | 4.61 in |
| July | 81.5°F | 60.0°F | 4.09 in | 83.8°F | 59.1°F | 4.33 in |
| August | 79.7°F | 58.2°F | 4.12 in | 81.5°F | 57.9°F | 4.36 in |
| September | 73.5°F | 50.6°F | 3.38 in | 74.1°F | 50.0°F | 3.44 in |
| October | 60.9°F | 39.7°F | 4.33 in | 61.9°F | 38.9°F | 4.22 in |
| November | 47.2°F | 30.8°F | 2.90 in | 49.1°F | 29.0°F | 2.92 in |
| December | 36.2°F | 22.5°F | 2.82 in | 37.4°F | 20.6°F | 3.20 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 →