Climate twins of Lake Oswego, OR
These are the US cities whose 12-month climate pattern most closely matches Lake Oswego'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: Lake Oswego vs its climate twin
Top match: SeaTac, WA
| Month | Lake Oswego | SeaTac | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 48.3°F | 36.7°F | 6.54 in | 48.0°F | 37.7°F | 5.78 in |
| February | 52.5°F | 37.5°F | 4.46 in | 50.3°F | 37.7°F | 3.76 in |
| March | 58.0°F | 39.8°F | 4.78 in | 54.2°F | 39.9°F | 4.17 in |
| April | 63.5°F | 43.3°F | 3.84 in | 59.3°F | 43.3°F | 3.18 in |
| May | 70.9°F | 48.4°F | 2.54 in | 66.3°F | 48.7°F | 1.88 in |
| June | 76.2°F | 52.9°F | 1.79 in | 71.1°F | 53.0°F | 1.45 in |
| July | 83.9°F | 57.0°F | 0.50 in | 77.4°F | 56.8°F | 0.60 in |
| August | 84.1°F | 57.5°F | 0.56 in | 77.6°F | 57.2°F | 0.97 in |
| September | 77.9°F | 52.9°F | 1.64 in | 71.6°F | 53.6°F | 1.61 in |
| October | 64.9°F | 46.5°F | 4.23 in | 60.5°F | 47.0°F | 3.91 in |
| November | 53.4°F | 40.5°F | 6.73 in | 52.1°F | 40.9°F | 6.31 in |
| December | 47.3°F | 36.3°F | 7.20 in | 47.0°F | 37.1°F | 5.72 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 →