Climate twins of Butler, IL
These are the US cities whose 12-month climate pattern most closely matches Butler'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: Butler vs its climate twin
Top match: Iberia, MO
| Month | Butler | Iberia | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 38.4°F | 21.4°F | 2.52 in | 41.1°F | 20.7°F | 2.40 in |
| February | 44.5°F | 25.4°F | 2.61 in | 46.5°F | 24.8°F | 2.21 in |
| March | 55.4°F | 34.2°F | 3.05 in | 56.3°F | 33.7°F | 3.32 in |
| April | 68.3°F | 44.1°F | 5.03 in | 66.9°F | 43.7°F | 4.79 in |
| May | 77.7°F | 54.3°F | 5.06 in | 75.2°F | 54.6°F | 4.93 in |
| June | 86.0°F | 63.3°F | 3.83 in | 83.1°F | 63.5°F | 4.15 in |
| July | 88.7°F | 66.6°F | 3.74 in | 87.9°F | 67.5°F | 3.99 in |
| August | 87.3°F | 64.7°F | 3.14 in | 87.2°F | 65.8°F | 3.69 in |
| September | 81.7°F | 56.7°F | 3.30 in | 79.8°F | 56.7°F | 3.86 in |
| October | 69.7°F | 45.8°F | 3.41 in | 69.0°F | 46.1°F | 3.34 in |
| November | 54.6°F | 35.2°F | 3.76 in | 55.6°F | 34.6°F | 3.64 in |
| December | 42.8°F | 26.4°F | 2.62 in | 44.7°F | 25.9°F | 2.64 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 →