Climate twins of South Haven, MI
These are the US cities whose 12-month climate pattern most closely matches South Haven'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: South Haven vs its climate twin
Top match: South Amherst, OH
| Month | South Haven | South Amherst | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 33.5°F | 22.1°F | 2.71 in | 33.6°F | 19.8°F | 2.11 in |
| February | 35.8°F | 23.9°F | 2.04 in | 36.3°F | 21.2°F | 1.66 in |
| March | 44.8°F | 29.9°F | 2.25 in | 45.3°F | 28.8°F | 2.48 in |
| April | 56.1°F | 39.3°F | 3.58 in | 58.8°F | 38.5°F | 3.28 in |
| May | 67.7°F | 49.4°F | 3.91 in | 70.0°F | 49.2°F | 3.64 in |
| June | 75.9°F | 59.6°F | 3.73 in | 79.0°F | 58.8°F | 3.87 in |
| July | 80.0°F | 65.6°F | 3.16 in | 82.3°F | 62.2°F | 3.56 in |
| August | 79.1°F | 64.0°F | 3.70 in | 79.9°F | 60.2°F | 3.63 in |
| September | 73.7°F | 57.2°F | 3.19 in | 74.6°F | 53.0°F | 3.74 in |
| October | 62.2°F | 47.5°F | 3.89 in | 62.6°F | 43.2°F | 3.50 in |
| November | 49.2°F | 36.2°F | 2.68 in | 49.3°F | 34.0°F | 2.96 in |
| December | 38.6°F | 27.9°F | 2.38 in | 38.5°F | 26.0°F | 2.29 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 →