Climate twins of Chatham, MI
These are the US cities whose 12-month climate pattern most closely matches Chatham'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: Chatham vs its climate twin
Top match: Sault Ste. Marie, MI
| Month | Chatham | Sault Ste. Marie | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 24.5°F | 8.0°F | 2.04 in | 24.0°F | 8.4°F | 2.21 in |
| February | 27.4°F | 6.9°F | 1.53 in | 26.4°F | 9.3°F | 1.51 in |
| March | 36.9°F | 15.4°F | 1.69 in | 35.5°F | 17.9°F | 1.81 in |
| April | 48.3°F | 27.3°F | 2.44 in | 48.5°F | 30.2°F | 2.63 in |
| May | 63.1°F | 38.8°F | 3.27 in | 63.2°F | 41.0°F | 2.64 in |
| June | 73.3°F | 48.4°F | 3.37 in | 72.5°F | 49.7°F | 2.85 in |
| July | 77.9°F | 53.7°F | 3.58 in | 76.8°F | 55.2°F | 3.07 in |
| August | 76.5°F | 52.7°F | 3.03 in | 75.8°F | 55.4°F | 3.19 in |
| September | 68.8°F | 46.2°F | 4.25 in | 68.0°F | 48.7°F | 3.93 in |
| October | 54.7°F | 35.1°F | 4.74 in | 54.1°F | 38.5°F | 4.38 in |
| November | 40.4°F | 25.0°F | 2.86 in | 41.2°F | 28.3°F | 3.44 in |
| December | 29.8°F | 14.5°F | 2.29 in | 30.5°F | 17.1°F | 2.80 in |
Cities that consider Chatham their climate twin
These US cities have Chatham in their top 3 most-similar list — meaning if you were to move from any of these places, Chatham would feel familiar.
- Sault Ste. Marie, MI (ranks Chatham #1)
- Mackinac Island, MI (ranks Chatham #2)
- St. Ignace, MI (ranks Chatham #2)
- Alanson, MI (ranks Chatham #2)
- Pellston, MI (ranks Chatham #2)
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 →