Climate twins of Washington, VA
These are the US cities whose 12-month climate pattern most closely matches Washington'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: Washington vs its climate twin
Top match: Ridgeway, VA
| Month | Washington | Ridgeway | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 43.1°F | 24.3°F | 3.61 in | 48.4°F | 23.8°F | 3.83 in |
| February | 46.9°F | 25.5°F | 2.77 in | 52.2°F | 25.5°F | 3.04 in |
| March | 54.1°F | 31.1°F | 4.01 in | 60.3°F | 31.6°F | 4.08 in |
| April | 65.3°F | 41.1°F | 4.01 in | 70.8°F | 40.4°F | 3.60 in |
| May | 72.9°F | 50.2°F | 4.67 in | 77.7°F | 50.3°F | 4.50 in |
| June | 81.2°F | 59.0°F | 5.21 in | 84.7°F | 59.2°F | 4.41 in |
| July | 85.2°F | 63.6°F | 3.67 in | 88.0°F | 64.0°F | 4.01 in |
| August | 83.8°F | 62.2°F | 4.12 in | 85.9°F | 62.6°F | 4.17 in |
| September | 77.3°F | 55.7°F | 5.44 in | 79.8°F | 55.5°F | 5.09 in |
| October | 67.2°F | 44.0°F | 3.68 in | 70.7°F | 42.8°F | 3.57 in |
| November | 56.9°F | 35.0°F | 3.69 in | 60.3°F | 31.7°F | 3.33 in |
| December | 46.5°F | 28.1°F | 3.96 in | 51.1°F | 26.3°F | 3.72 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 →