Climate twins of Franklin, IL
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: Muncie, IL
| Month | Franklin | Muncie | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 36.0°F | 18.1°F | 1.93 in | 34.0°F | 18.2°F | 2.38 in |
| February | 41.1°F | 21.4°F | 1.72 in | 38.9°F | 21.6°F | 2.18 in |
| March | 52.4°F | 30.1°F | 2.81 in | 50.6°F | 30.2°F | 2.82 in |
| April | 64.9°F | 40.3°F | 4.27 in | 63.7°F | 40.8°F | 3.88 in |
| May | 74.8°F | 51.7°F | 4.82 in | 73.3°F | 52.4°F | 4.96 in |
| June | 83.3°F | 60.8°F | 4.89 in | 81.6°F | 62.0°F | 4.96 in |
| July | 86.5°F | 64.0°F | 3.96 in | 83.6°F | 65.1°F | 4.39 in |
| August | 85.2°F | 61.7°F | 3.39 in | 82.6°F | 62.9°F | 3.50 in |
| September | 80.0°F | 53.5°F | 3.50 in | 77.9°F | 55.7°F | 3.35 in |
| October | 67.7°F | 42.3°F | 2.97 in | 65.7°F | 44.3°F | 3.32 in |
| November | 53.0°F | 31.9°F | 3.01 in | 51.1°F | 32.4°F | 3.15 in |
| December | 41.2°F | 23.3°F | 1.98 in | 39.3°F | 23.9°F | 2.35 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 →