Climate twins of Port Townsend, WA
These are the US cities whose 12-month climate pattern most closely matches Port Townsend'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: Port Townsend vs its climate twin
Top match: Talent, OR
| Month | Port Townsend | Talent | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 46.4°F | 38.4°F | 2.24 in | 49.0°F | 29.6°F | 2.35 in |
| February | 48.6°F | 38.3°F | 1.61 in | 53.7°F | 29.7°F | 2.04 in |
| March | 52.1°F | 40.3°F | 1.85 in | 58.0°F | 31.8°F | 2.03 in |
| April | 57.5°F | 43.2°F | 1.53 in | 62.8°F | 35.2°F | 1.95 in |
| May | 63.1°F | 47.2°F | 1.52 in | 71.1°F | 41.2°F | 1.64 in |
| June | 67.9°F | 51.0°F | 1.37 in | 78.5°F | 45.8°F | 0.85 in |
| July | 72.6°F | 53.0°F | 0.73 in | 88.1°F | 50.6°F | 0.44 in |
| August | 73.1°F | 53.5°F | 0.54 in | 87.4°F | 49.4°F | 0.37 in |
| September | 68.0°F | 51.0°F | 1.10 in | 80.8°F | 43.3°F | 0.50 in |
| October | 58.2°F | 46.3°F | 1.64 in | 68.0°F | 36.1°F | 1.41 in |
| November | 50.1°F | 41.3°F | 2.43 in | 54.2°F | 32.5°F | 2.57 in |
| December | 45.3°F | 38.4°F | 2.58 in | 47.2°F | 29.2°F | 3.38 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 →