Climate twins of Porter, IN
These are the US cities whose 12-month climate pattern most closely matches Porter'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: Porter vs its climate twin
Top match: Dalzell, IL
| Month | Porter | Dalzell | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.1°F | 17.8°F | 2.21 in | 30.0°F | 14.0°F | 1.81 in |
| February | 35.5°F | 21.1°F | 1.97 in | 34.5°F | 17.6°F | 1.77 in |
| March | 45.6°F | 29.8°F | 2.34 in | 47.5°F | 27.3°F | 2.28 in |
| April | 57.2°F | 39.5°F | 3.55 in | 60.9°F | 37.7°F | 3.77 in |
| May | 68.4°F | 49.6°F | 4.27 in | 72.5°F | 49.2°F | 4.49 in |
| June | 77.5°F | 59.5°F | 4.31 in | 81.3°F | 59.4°F | 4.62 in |
| July | 81.6°F | 64.3°F | 3.98 in | 84.0°F | 62.8°F | 3.89 in |
| August | 80.0°F | 63.1°F | 4.08 in | 82.2°F | 60.8°F | 3.70 in |
| September | 74.3°F | 56.3°F | 3.65 in | 76.9°F | 52.6°F | 3.41 in |
| October | 62.3°F | 44.7°F | 3.75 in | 63.9°F | 41.1°F | 3.50 in |
| November | 48.7°F | 34.2°F | 2.76 in | 48.4°F | 30.0°F | 2.71 in |
| December | 37.4°F | 24.1°F | 2.29 in | 35.5°F | 19.9°F | 2.10 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 →