Climate twins of Union, WV
These are the US cities whose 12-month climate pattern most closely matches Union'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: Union vs its climate twin
Top match: Valley Grove, WV
| Month | Union | Valley Grove | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 42.4°F | 22.2°F | 2.65 in | 37.0°F | 22.3°F | 2.75 in |
| February | 46.5°F | 24.1°F | 2.28 in | 40.1°F | 24.4°F | 2.15 in |
| March | 55.1°F | 29.9°F | 3.31 in | 49.7°F | 31.3°F | 2.99 in |
| April | 65.9°F | 39.1°F | 3.50 in | 62.5°F | 41.6°F | 3.14 in |
| May | 74.0°F | 48.2°F | 4.60 in | 71.5°F | 51.0°F | 4.00 in |
| June | 81.2°F | 57.1°F | 3.84 in | 78.6°F | 59.2°F | 4.14 in |
| July | 84.1°F | 60.8°F | 3.76 in | 82.9°F | 63.3°F | 3.35 in |
| August | 83.3°F | 59.2°F | 3.25 in | 81.8°F | 61.6°F | 3.74 in |
| September | 77.7°F | 51.6°F | 3.60 in | 75.0°F | 55.1°F | 3.21 in |
| October | 67.5°F | 39.6°F | 2.56 in | 63.6°F | 44.9°F | 2.81 in |
| November | 56.2°F | 30.5°F | 2.52 in | 51.2°F | 35.2°F | 2.65 in |
| December | 46.0°F | 25.4°F | 2.90 in | 41.1°F | 27.6°F | 2.62 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 →