Climate twins of Decatur, IA
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: West Burlington, IA
| Month | Decatur | West Burlington | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 33.1°F | 15.6°F | 1.04 in | 32.3°F | 16.4°F | 1.45 in |
| February | 38.1°F | 19.6°F | 1.35 in | 37.2°F | 20.5°F | 1.69 in |
| March | 50.8°F | 30.7°F | 2.20 in | 50.2°F | 31.1°F | 2.43 in |
| April | 62.5°F | 41.4°F | 4.25 in | 62.8°F | 41.9°F | 3.92 in |
| May | 72.0°F | 52.5°F | 5.14 in | 73.1°F | 52.9°F | 4.93 in |
| June | 81.5°F | 62.2°F | 4.81 in | 82.3°F | 62.6°F | 4.87 in |
| July | 85.4°F | 66.2°F | 4.11 in | 85.2°F | 66.0°F | 4.02 in |
| August | 83.8°F | 63.9°F | 4.38 in | 83.5°F | 64.0°F | 3.77 in |
| September | 76.5°F | 55.2°F | 3.71 in | 77.5°F | 55.8°F | 3.53 in |
| October | 64.0°F | 43.3°F | 2.82 in | 64.5°F | 44.0°F | 3.09 in |
| November | 49.7°F | 31.1°F | 2.09 in | 49.8°F | 32.3°F | 2.29 in |
| December | 37.7°F | 20.9°F | 1.48 in | 37.4°F | 22.3°F | 1.87 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.
- West Burlington, IA (ranks Decatur #2)
- Biggsville, IL (ranks Decatur #2)
- Gladstone, IL (ranks Decatur #2)
- Media, IL (ranks Decatur #2)
- Oquawka, IL (ranks Decatur #2)
- Mediapolis, IA (ranks Decatur #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 →