Climate twins of Troy, MT
These are the US cities whose 12-month climate pattern most closely matches Troy'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: Troy vs its climate twin
Top match: South Cle Elum, WA
| Month | Troy | South Cle Elum | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.7°F | 22.9°F | 2.63 in | 35.0°F | 22.2°F | 3.40 in |
| February | 39.0°F | 23.6°F | 1.85 in | 40.7°F | 23.6°F | 2.49 in |
| March | 49.7°F | 28.0°F | 2.44 in | 48.9°F | 27.8°F | 2.73 in |
| April | 59.1°F | 33.0°F | 1.65 in | 57.3°F | 32.9°F | 1.41 in |
| May | 69.8°F | 40.1°F | 1.79 in | 66.1°F | 40.4°F | 1.64 in |
| June | 75.8°F | 46.2°F | 2.52 in | 71.9°F | 46.8°F | 1.10 in |
| July | 86.7°F | 49.4°F | 0.88 in | 81.1°F | 52.7°F | 0.54 in |
| August | 86.0°F | 47.7°F | 0.71 in | 81.4°F | 51.1°F | 0.47 in |
| September | 74.9°F | 41.7°F | 1.21 in | 72.9°F | 42.7°F | 0.90 in |
| October | 56.5°F | 34.6°F | 2.42 in | 57.8°F | 33.9°F | 2.44 in |
| November | 40.6°F | 29.3°F | 3.50 in | 43.2°F | 27.7°F | 4.07 in |
| December | 32.4°F | 23.5°F | 2.79 in | 34.3°F | 22.3°F | 3.50 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 →