Climate twins of Madison, OH
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: Hartford, CT
| Month | Madison | Hartford | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 36.8°F | 23.7°F | 3.14 in | 36.8°F | 20.3°F | 2.94 in |
| February | 38.7°F | 24.1°F | 2.15 in | 39.5°F | 22.1°F | 2.57 in |
| March | 46.1°F | 30.2°F | 2.83 in | 47.6°F | 29.6°F | 3.51 in |
| April | 58.1°F | 40.4°F | 3.47 in | 60.1°F | 40.0°F | 3.79 in |
| May | 69.1°F | 51.4°F | 3.42 in | 70.9°F | 50.1°F | 3.43 in |
| June | 78.1°F | 61.5°F | 3.63 in | 79.6°F | 59.8°F | 3.88 in |
| July | 82.3°F | 66.9°F | 4.12 in | 84.6°F | 65.7°F | 3.87 in |
| August | 81.6°F | 65.7°F | 3.44 in | 83.0°F | 64.2°F | 3.48 in |
| September | 76.2°F | 59.4°F | 3.91 in | 75.6°F | 56.0°F | 3.97 in |
| October | 64.9°F | 49.1°F | 4.04 in | 63.7°F | 44.3°F | 4.20 in |
| November | 52.6°F | 38.8°F | 3.17 in | 52.1°F | 34.6°F | 3.44 in |
| December | 42.0°F | 30.3°F | 3.14 in | 41.7°F | 25.9°F | 3.75 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 →