Climate twins of Willey, IA
These are the US cities whose 12-month climate pattern most closely matches Willey'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: Willey vs its climate twin
Top match: Good Thunder, MN
| Month | Willey | Good Thunder | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 27.9°F | 10.3°F | 0.90 in | 25.5°F | 8.3°F | 0.83 in |
| February | 32.8°F | 14.2°F | 1.11 in | 30.2°F | 12.2°F | 0.87 in |
| March | 46.2°F | 25.3°F | 1.87 in | 42.8°F | 24.3°F | 1.67 in |
| April | 59.9°F | 36.1°F | 3.35 in | 59.4°F | 36.3°F | 3.30 in |
| May | 71.1°F | 49.2°F | 4.49 in | 72.5°F | 48.7°F | 4.27 in |
| June | 81.3°F | 60.0°F | 5.12 in | 81.7°F | 59.5°F | 5.26 in |
| July | 84.3°F | 63.9°F | 4.36 in | 84.1°F | 62.6°F | 4.15 in |
| August | 82.2°F | 61.2°F | 4.06 in | 81.6°F | 59.8°F | 3.93 in |
| September | 76.3°F | 51.8°F | 2.95 in | 75.9°F | 51.6°F | 3.34 in |
| October | 62.9°F | 39.5°F | 2.68 in | 61.5°F | 39.2°F | 2.56 in |
| November | 46.4°F | 26.7°F | 1.44 in | 44.2°F | 26.4°F | 1.47 in |
| December | 33.1°F | 16.1°F | 1.38 in | 30.4°F | 14.3°F | 1.12 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 →