Climate twins of New Castle, IN
These are the US cities whose 12-month climate pattern most closely matches New Castle'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: New Castle vs its climate twin
Top match: Hartford (Croton), OH
| Month | New Castle | Hartford (Croton) | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 34.1°F | 17.1°F | 3.01 in | 33.5°F | 16.9°F | 3.06 in |
| February | 38.0°F | 19.4°F | 2.46 in | 37.2°F | 18.6°F | 2.53 in |
| March | 48.8°F | 28.0°F | 3.40 in | 47.9°F | 27.1°F | 3.44 in |
| April | 61.8°F | 38.4°F | 4.42 in | 61.8°F | 38.2°F | 4.48 in |
| May | 72.2°F | 49.7°F | 4.85 in | 71.6°F | 49.0°F | 4.54 in |
| June | 80.2°F | 58.6°F | 5.34 in | 79.7°F | 58.1°F | 5.03 in |
| July | 83.1°F | 61.0°F | 4.70 in | 83.0°F | 61.1°F | 4.21 in |
| August | 82.0°F | 58.9°F | 3.38 in | 81.6°F | 59.2°F | 3.85 in |
| September | 77.2°F | 52.0°F | 3.07 in | 75.4°F | 52.0°F | 3.58 in |
| October | 65.2°F | 41.0°F | 3.23 in | 63.5°F | 40.7°F | 2.97 in |
| November | 50.6°F | 31.0°F | 3.45 in | 50.1°F | 31.1°F | 3.27 in |
| December | 38.8°F | 22.9°F | 3.04 in | 38.8°F | 22.9°F | 3.24 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 →