Climate twins of Monmouth, OR
These are the US cities whose 12-month climate pattern most closely matches Monmouth'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: Monmouth vs its climate twin
Top match: Rainier, WA
| Month | Monmouth | Rainier | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 46.6°F | 35.2°F | 7.48 in | 46.0°F | 33.2°F | 7.80 in |
| February | 50.6°F | 35.6°F | 5.56 in | 49.1°F | 32.3°F | 5.09 in |
| March | 55.8°F | 37.6°F | 5.08 in | 53.7°F | 34.5°F | 5.68 in |
| April | 60.7°F | 40.2°F | 3.71 in | 58.9°F | 37.5°F | 3.67 in |
| May | 68.3°F | 45.1°F | 2.36 in | 66.1°F | 43.0°F | 2.26 in |
| June | 73.2°F | 48.8°F | 1.49 in | 70.8°F | 47.4°F | 1.46 in |
| July | 82.5°F | 52.1°F | 0.31 in | 77.6°F | 50.7°F | 0.53 in |
| August | 83.1°F | 52.1°F | 0.47 in | 78.0°F | 50.5°F | 0.96 in |
| September | 77.6°F | 49.1°F | 1.60 in | 72.1°F | 46.2°F | 2.04 in |
| October | 64.5°F | 43.8°F | 3.80 in | 60.2°F | 40.5°F | 5.07 in |
| November | 52.1°F | 38.4°F | 7.18 in | 50.6°F | 35.8°F | 8.21 in |
| December | 45.5°F | 34.8°F | 8.74 in | 44.9°F | 32.8°F | 7.85 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 →