Climate twins of Troutdale, OR
These are the US cities whose 12-month climate pattern most closely matches Troutdale'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: Troutdale vs its climate twin
Top match: Sedro-Woolley, WA
| Month | Troutdale | Sedro-Woolley | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 44.2°F | 35.4°F | 6.31 in | 46.0°F | 34.7°F | 6.18 in |
| February | 48.5°F | 36.5°F | 4.69 in | 48.7°F | 35.0°F | 4.11 in |
| March | 54.7°F | 38.8°F | 5.07 in | 53.0°F | 37.8°F | 4.76 in |
| April | 60.5°F | 41.9°F | 4.24 in | 58.3°F | 41.3°F | 4.17 in |
| May | 67.7°F | 47.9°F | 3.31 in | 64.7°F | 46.8°F | 3.46 in |
| June | 72.9°F | 52.0°F | 2.40 in | 68.8°F | 50.6°F | 2.60 in |
| July | 80.8°F | 55.7°F | 0.64 in | 74.5°F | 53.1°F | 1.34 in |
| August | 81.4°F | 55.5°F | 0.70 in | 75.2°F | 52.9°F | 1.60 in |
| September | 75.2°F | 51.3°F | 1.86 in | 69.5°F | 49.3°F | 2.86 in |
| October | 62.7°F | 45.8°F | 4.59 in | 59.6°F | 43.2°F | 4.98 in |
| November | 51.3°F | 40.4°F | 7.47 in | 50.4°F | 38.6°F | 7.02 in |
| December | 44.5°F | 35.8°F | 7.10 in | 44.8°F | 34.2°F | 5.45 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 →