Climate twins of Washington, PA
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: Blacksburg, VA
| Month | Washington | Blacksburg | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 36.8°F | 20.0°F | 3.32 in | 41.6°F | 22.1°F | 3.23 in |
| February | 40.1°F | 21.7°F | 2.52 in | 45.3°F | 24.1°F | 2.83 in |
| March | 49.4°F | 28.7°F | 3.51 in | 53.2°F | 30.2°F | 3.78 in |
| April | 62.6°F | 39.5°F | 3.26 in | 63.9°F | 38.9°F | 3.77 in |
| May | 71.9°F | 49.1°F | 4.14 in | 71.9°F | 48.4°F | 4.47 in |
| June | 79.8°F | 57.9°F | 4.48 in | 78.9°F | 56.9°F | 4.27 in |
| July | 83.4°F | 61.7°F | 3.63 in | 82.3°F | 61.0°F | 4.21 in |
| August | 82.5°F | 60.3°F | 3.48 in | 81.2°F | 59.5°F | 3.57 in |
| September | 76.1°F | 53.5°F | 3.57 in | 75.8°F | 52.9°F | 3.45 in |
| October | 64.2°F | 42.6°F | 3.00 in | 65.6°F | 40.9°F | 2.91 in |
| November | 51.9°F | 33.4°F | 3.11 in | 54.8°F | 30.7°F | 2.85 in |
| December | 41.4°F | 25.9°F | 3.32 in | 44.9°F | 25.3°F | 3.30 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 →