Climate twins of Franklin, OH
These are the US cities whose 12-month climate pattern most closely matches Franklin'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: Franklin vs its climate twin
Top match: Zionsville, IN
| Month | Franklin | Zionsville | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 38.4°F | 20.4°F | 3.32 in | 33.4°F | 19.7°F | 2.86 in |
| February | 42.0°F | 21.8°F | 2.54 in | 38.7°F | 22.9°F | 2.47 in |
| March | 52.2°F | 30.0°F | 3.46 in | 49.8°F | 31.9°F | 3.16 in |
| April | 64.7°F | 39.3°F | 4.58 in | 63.0°F | 42.1°F | 4.30 in |
| May | 74.1°F | 50.6°F | 4.40 in | 72.7°F | 52.8°F | 4.56 in |
| June | 82.4°F | 59.9°F | 4.45 in | 80.7°F | 61.3°F | 4.67 in |
| July | 85.8°F | 63.5°F | 4.34 in | 83.0°F | 64.0°F | 3.83 in |
| August | 85.1°F | 61.1°F | 2.87 in | 81.7°F | 62.1°F | 2.85 in |
| September | 78.9°F | 53.1°F | 2.87 in | 76.6°F | 55.0°F | 3.29 in |
| October | 66.7°F | 41.2°F | 3.20 in | 64.5°F | 44.4°F | 2.97 in |
| November | 53.4°F | 31.9°F | 3.03 in | 49.8°F | 34.0°F | 3.43 in |
| December | 42.5°F | 25.5°F | 3.25 in | 37.8°F | 25.0°F | 2.88 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 →