Climate twins of Sequim, WA
These are the US cities whose 12-month climate pattern most closely matches Sequim'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: Sequim vs its climate twin
Top match: Lonerock, OR
| Month | Sequim | Lonerock | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 46.2°F | 32.3°F | 2.18 in | 42.2°F | 25.8°F | 1.40 in |
| February | 47.8°F | 32.1°F | 1.39 in | 46.1°F | 25.5°F | 1.17 in |
| March | 51.3°F | 34.5°F | 1.49 in | 52.2°F | 27.8°F | 1.51 in |
| April | 55.8°F | 37.9°F | 1.23 in | 57.9°F | 31.3°F | 1.35 in |
| May | 61.5°F | 44.2°F | 1.16 in | 66.3°F | 37.3°F | 2.12 in |
| June | 65.4°F | 48.8°F | 0.94 in | 73.0°F | 41.9°F | 1.32 in |
| July | 70.0°F | 51.5°F | 0.51 in | 84.5°F | 45.5°F | 0.44 in |
| August | 70.4°F | 51.1°F | 0.56 in | 84.2°F | 44.7°F | 0.58 in |
| September | 65.9°F | 46.2°F | 0.87 in | 74.3°F | 39.9°F | 0.55 in |
| October | 57.5°F | 39.9°F | 1.63 in | 62.8°F | 33.4°F | 1.47 in |
| November | 50.4°F | 34.6°F | 2.64 in | 48.1°F | 28.4°F | 1.38 in |
| December | 45.9°F | 31.8°F | 2.25 in | 40.6°F | 24.3°F | 1.76 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 →