Climate twins of Mason, MI
These are the US cities whose 12-month climate pattern most closely matches Mason'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: Mason vs its climate twin
Top match: Sugar Grove, IL
| Month | Mason | Sugar Grove | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.8°F | 17.5°F | 2.08 in | 30.5°F | 14.7°F | 1.30 in |
| February | 34.4°F | 18.8°F | 1.60 in | 34.9°F | 18.0°F | 1.41 in |
| March | 44.9°F | 27.2°F | 1.68 in | 47.5°F | 28.1°F | 2.21 in |
| April | 57.7°F | 37.3°F | 3.55 in | 60.4°F | 37.2°F | 3.60 in |
| May | 70.2°F | 48.4°F | 4.36 in | 71.9°F | 49.0°F | 4.06 in |
| June | 79.4°F | 57.6°F | 3.79 in | 81.4°F | 58.5°F | 3.98 in |
| July | 83.0°F | 61.2°F | 3.37 in | 84.4°F | 61.8°F | 3.71 in |
| August | 81.4°F | 59.8°F | 3.45 in | 82.2°F | 59.5°F | 3.35 in |
| September | 75.5°F | 51.8°F | 3.17 in | 76.2°F | 51.6°F | 3.01 in |
| October | 61.6°F | 41.5°F | 3.12 in | 63.3°F | 40.6°F | 3.23 in |
| November | 48.2°F | 32.2°F | 2.55 in | 48.1°F | 29.2°F | 2.30 in |
| December | 37.1°F | 23.5°F | 1.60 in | 35.8°F | 20.6°F | 1.68 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 →