Climate twins of Lancaster, WI
These are the US cities whose 12-month climate pattern most closely matches Lancaster'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: Lancaster vs its climate twin
Top match: Rockford, IA
| Month | Lancaster | Rockford | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 25.3°F | 8.9°F | 1.20 in | 24.6°F | 8.6°F | 1.01 in |
| February | 29.9°F | 12.9°F | 1.29 in | 29.5°F | 12.6°F | 1.14 in |
| March | 42.9°F | 24.8°F | 1.99 in | 43.1°F | 25.3°F | 1.93 in |
| April | 56.7°F | 36.5°F | 3.80 in | 58.1°F | 36.7°F | 3.73 in |
| May | 68.3°F | 47.9°F | 4.39 in | 69.5°F | 48.5°F | 5.06 in |
| June | 77.4°F | 58.2°F | 5.93 in | 78.8°F | 58.6°F | 6.13 in |
| July | 80.9°F | 61.8°F | 5.03 in | 82.0°F | 62.1°F | 4.92 in |
| August | 79.1°F | 59.8°F | 3.86 in | 79.6°F | 59.7°F | 4.28 in |
| September | 72.2°F | 51.6°F | 4.03 in | 73.4°F | 51.3°F | 3.82 in |
| October | 59.2°F | 39.3°F | 2.90 in | 60.3°F | 38.8°F | 2.58 in |
| November | 43.8°F | 27.5°F | 2.37 in | 43.7°F | 26.3°F | 1.74 in |
| December | 31.0°F | 16.0°F | 1.70 in | 29.8°F | 15.1°F | 1.38 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 →