Climate twins of Wallingford, IA
These are the US cities whose 12-month climate pattern most closely matches Wallingford'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: Wallingford vs its climate twin
Top match: Lennox, SD
| Month | Wallingford | Lennox | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 23.1°F | 6.6°F | 0.56 in | 25.3°F | 5.8°F | 0.56 in |
| February | 27.5°F | 10.7°F | 0.46 in | 30.6°F | 10.5°F | 0.75 in |
| March | 40.6°F | 23.2°F | 1.45 in | 43.7°F | 22.0°F | 1.31 in |
| April | 56.3°F | 33.9°F | 3.13 in | 57.8°F | 34.3°F | 2.88 in |
| May | 68.7°F | 46.4°F | 4.50 in | 69.8°F | 46.7°F | 4.08 in |
| June | 78.5°F | 57.1°F | 4.57 in | 79.8°F | 58.2°F | 4.66 in |
| July | 81.1°F | 60.1°F | 3.76 in | 83.3°F | 61.8°F | 3.55 in |
| August | 78.6°F | 57.4°F | 3.31 in | 80.2°F | 59.0°F | 2.99 in |
| September | 72.8°F | 48.5°F | 3.14 in | 73.6°F | 50.3°F | 2.90 in |
| October | 58.8°F | 35.9°F | 2.47 in | 60.0°F | 36.4°F | 2.21 in |
| November | 42.0°F | 23.2°F | 1.37 in | 43.5°F | 23.0°F | 1.15 in |
| December | 28.1°F | 12.2°F | 0.54 in | 29.4°F | 11.3°F | 0.77 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 →