Climate twins of Decatur, IN
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: Otterbein, IN
| Month | Decatur | Otterbein | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 33.1°F | 18.3°F | 2.51 in | 32.4°F | 16.3°F | 2.21 in |
| February | 36.1°F | 20.3°F | 2.07 in | 36.8°F | 19.5°F | 1.93 in |
| March | 47.5°F | 28.5°F | 2.75 in | 48.2°F | 28.7°F | 2.59 in |
| April | 60.5°F | 39.1°F | 4.08 in | 61.3°F | 39.2°F | 4.00 in |
| May | 72.0°F | 50.0°F | 4.75 in | 72.2°F | 50.9°F | 4.70 in |
| June | 80.7°F | 60.2°F | 4.58 in | 80.8°F | 60.3°F | 4.85 in |
| July | 83.8°F | 62.7°F | 4.26 in | 83.0°F | 62.5°F | 4.24 in |
| August | 82.1°F | 60.5°F | 4.04 in | 81.7°F | 60.1°F | 3.66 in |
| September | 76.7°F | 52.7°F | 3.04 in | 77.0°F | 52.2°F | 3.12 in |
| October | 64.0°F | 42.1°F | 2.91 in | 64.5°F | 41.4°F | 3.03 in |
| November | 49.8°F | 32.7°F | 3.04 in | 49.6°F | 31.5°F | 3.02 in |
| December | 38.0°F | 24.3°F | 2.59 in | 37.4°F | 22.2°F | 2.35 in |
Cities that consider Decatur their climate twin
These US cities have Decatur in their top 3 most-similar list — meaning if you were to move from any of these places, Decatur would feel familiar.
- Otterbein, IN (ranks Decatur #3)
- Danvers, IL (ranks Decatur #3)
- McLean, IL (ranks Decatur #3)
- Stanford, IL (ranks Decatur #3)
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 →