Climate twins of Plymouth, WI
These are the US cities whose 12-month climate pattern most closely matches Plymouth'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: Plymouth vs its climate twin
Top match: Harrison, MI
| Month | Plymouth | Harrison | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 26.3°F | 11.6°F | 1.59 in | 29.2°F | 12.7°F | 2.15 in |
| February | 29.7°F | 13.7°F | 1.41 in | 32.0°F | 12.5°F | 1.70 in |
| March | 40.5°F | 23.6°F | 1.97 in | 42.6°F | 20.4°F | 2.05 in |
| April | 53.2°F | 34.2°F | 3.63 in | 55.5°F | 31.0°F | 3.53 in |
| May | 65.5°F | 45.4°F | 3.83 in | 68.4°F | 42.7°F | 3.78 in |
| June | 75.7°F | 55.1°F | 4.22 in | 78.1°F | 52.8°F | 3.46 in |
| July | 80.9°F | 60.3°F | 3.50 in | 82.0°F | 57.1°F | 3.20 in |
| August | 78.6°F | 58.8°F | 3.69 in | 79.9°F | 55.2°F | 3.39 in |
| September | 71.8°F | 50.5°F | 2.81 in | 72.7°F | 47.4°F | 2.79 in |
| October | 58.4°F | 39.3°F | 2.96 in | 59.5°F | 37.0°F | 3.24 in |
| November | 44.1°F | 28.5°F | 2.14 in | 45.6°F | 28.3°F | 2.53 in |
| December | 32.1°F | 18.3°F | 1.82 in | 34.3°F | 19.9°F | 2.20 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 →