Climate twins of DuPont, WA
These are the US cities whose 12-month climate pattern most closely matches DuPont'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: DuPont vs its climate twin
Top match: Corvallis, OR
| Month | DuPont | Corvallis | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 46.3°F | 36.4°F | 6.06 in | 47.4°F | 34.3°F | 6.46 in |
| February | 48.4°F | 36.5°F | 4.11 in | 51.3°F | 34.8°F | 4.80 in |
| March | 53.1°F | 38.5°F | 4.63 in | 56.1°F | 37.0°F | 4.95 in |
| April | 57.5°F | 41.4°F | 3.39 in | 60.9°F | 39.5°F | 3.29 in |
| May | 64.5°F | 46.5°F | 2.08 in | 68.1°F | 44.5°F | 2.31 in |
| June | 69.7°F | 50.7°F | 1.36 in | 73.8°F | 48.6°F | 1.34 in |
| July | 75.5°F | 54.0°F | 0.68 in | 82.9°F | 52.1°F | 0.34 in |
| August | 75.6°F | 54.3°F | 0.86 in | 83.7°F | 51.4°F | 0.39 in |
| September | 69.6°F | 51.4°F | 1.54 in | 77.6°F | 48.2°F | 1.49 in |
| October | 58.6°F | 45.7°F | 4.32 in | 65.0°F | 42.0°F | 3.50 in |
| November | 50.5°F | 39.8°F | 7.18 in | 53.2°F | 37.6°F | 6.46 in |
| December | 45.5°F | 36.2°F | 5.81 in | 46.7°F | 33.9°F | 7.71 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 →