Climate twins of Oregon City, OR
These are the US cities whose 12-month climate pattern most closely matches Oregon City'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: Oregon City vs its climate twin
Top match: Kent, WA
| Month | Oregon City | Kent | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 48.3°F | 36.7°F | 6.54 in | 48.4°F | 36.1°F | 5.77 in |
| February | 52.5°F | 37.5°F | 4.46 in | 51.2°F | 36.2°F | 3.99 in |
| March | 58.0°F | 39.8°F | 4.78 in | 55.8°F | 39.0°F | 4.36 in |
| April | 63.5°F | 43.3°F | 3.84 in | 61.4°F | 42.8°F | 3.06 in |
| May | 70.9°F | 48.4°F | 2.54 in | 68.0°F | 48.7°F | 2.10 in |
| June | 76.2°F | 52.9°F | 1.79 in | 71.9°F | 53.3°F | 1.68 in |
| July | 83.9°F | 57.0°F | 0.50 in | 78.3°F | 57.3°F | 0.67 in |
| August | 84.1°F | 57.5°F | 0.56 in | 78.3°F | 57.3°F | 0.92 in |
| September | 77.9°F | 52.9°F | 1.64 in | 72.5°F | 52.4°F | 1.49 in |
| October | 64.9°F | 46.5°F | 4.23 in | 61.3°F | 45.6°F | 4.07 in |
| November | 53.4°F | 40.5°F | 6.73 in | 52.7°F | 39.1°F | 6.23 in |
| December | 47.3°F | 36.3°F | 7.20 in | 47.0°F | 35.4°F | 5.75 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 →