Climate twins of Madison, IN
These are the US cities whose 12-month climate pattern most closely matches Madison'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: Madison vs its climate twin
Top match: Enfield, IL
| Month | Madison | Enfield | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 42.2°F | 23.8°F | 3.47 in | 41.1°F | 21.2°F | 3.50 in |
| February | 46.5°F | 24.8°F | 3.15 in | 46.0°F | 23.4°F | 3.11 in |
| March | 56.6°F | 32.9°F | 4.47 in | 56.1°F | 32.5°F | 4.37 in |
| April | 68.2°F | 43.0°F | 5.54 in | 68.0°F | 43.0°F | 5.17 in |
| May | 76.6°F | 53.8°F | 5.37 in | 76.8°F | 53.5°F | 5.16 in |
| June | 84.2°F | 62.4°F | 4.97 in | 85.3°F | 62.5°F | 4.31 in |
| July | 88.0°F | 66.1°F | 4.81 in | 87.6°F | 65.7°F | 4.43 in |
| August | 87.0°F | 65.0°F | 4.23 in | 86.8°F | 63.0°F | 3.50 in |
| September | 81.4°F | 57.9°F | 3.53 in | 81.4°F | 54.8°F | 3.22 in |
| October | 69.8°F | 46.1°F | 3.63 in | 70.1°F | 42.8°F | 3.43 in |
| November | 57.0°F | 35.3°F | 3.61 in | 56.2°F | 32.1°F | 4.22 in |
| December | 46.5°F | 28.9°F | 4.20 in | 45.0°F | 25.0°F | 3.90 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 →