Climate twins of Chester, MT
These are the US cities whose 12-month climate pattern most closely matches Chester'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: Chester vs its climate twin
Top match: Saco, MT
| Month | Chester | Saco | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 28.7°F | 2.6°F | 0.54 in | 25.6°F | 1.5°F | 0.26 in |
| February | 33.0°F | 6.2°F | 0.45 in | 30.1°F | 5.5°F | 0.33 in |
| March | 44.1°F | 16.6°F | 0.59 in | 42.8°F | 17.4°F | 0.53 in |
| April | 55.5°F | 27.5°F | 1.10 in | 57.3°F | 29.1°F | 1.05 in |
| May | 65.8°F | 38.2°F | 1.68 in | 67.5°F | 39.9°F | 1.77 in |
| June | 72.7°F | 46.2°F | 2.76 in | 74.3°F | 50.4°F | 3.01 in |
| July | 82.5°F | 51.7°F | 1.19 in | 82.8°F | 55.2°F | 1.69 in |
| August | 82.0°F | 49.7°F | 1.09 in | 82.1°F | 53.1°F | 1.35 in |
| September | 71.0°F | 40.5°F | 1.00 in | 71.5°F | 42.3°F | 1.35 in |
| October | 56.8°F | 27.3°F | 0.74 in | 57.2°F | 29.7°F | 1.05 in |
| November | 41.1°F | 15.2°F | 0.58 in | 40.8°F | 16.6°F | 0.54 in |
| December | 31.6°F | 5.6°F | 0.56 in | 29.0°F | 5.9°F | 0.43 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 →