Climate twins of East Helena, MT
These are the US cities whose 12-month climate pattern most closely matches East Helena'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: East Helena vs its climate twin
Top match: Fromberg, MT
| Month | East Helena | Fromberg | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.4°F | 13.5°F | 0.39 in | 35.4°F | 12.9°F | 0.29 in |
| February | 37.2°F | 17.2°F | 0.42 in | 38.9°F | 15.1°F | 0.33 in |
| March | 47.5°F | 24.6°F | 0.52 in | 50.4°F | 22.4°F | 0.47 in |
| April | 56.7°F | 32.4°F | 1.02 in | 57.7°F | 29.9°F | 1.57 in |
| May | 66.4°F | 41.5°F | 1.95 in | 67.4°F | 39.6°F | 2.25 in |
| June | 74.7°F | 48.7°F | 2.21 in | 77.3°F | 47.0°F | 1.80 in |
| July | 86.1°F | 55.1°F | 1.06 in | 87.2°F | 53.1°F | 0.83 in |
| August | 84.6°F | 52.9°F | 1.04 in | 86.3°F | 50.2°F | 0.61 in |
| September | 73.3°F | 44.6°F | 0.96 in | 75.3°F | 41.5°F | 1.15 in |
| October | 57.6°F | 33.5°F | 0.78 in | 59.7°F | 31.7°F | 1.23 in |
| November | 42.8°F | 22.8°F | 0.59 in | 45.8°F | 22.2°F | 0.60 in |
| December | 32.6°F | 14.2°F | 0.46 in | 35.9°F | 14.2°F | 0.37 in |
Cities that consider East Helena their climate twin
These US cities have East Helena in their top 3 most-similar list — meaning if you were to move from any of these places, East Helena would feel familiar.
- Spencer, ID (ranks East Helena #3)
- Dubois, ID (ranks East Helena #3)
- Cody, WY (ranks East Helena #3)
- Pavillion, WY (ranks East Helena #3)
- Havre, MT (ranks East Helena #3)
- Harlem, MT (ranks East Helena #2)
- Rexford, MT (ranks East Helena #3)
- Eureka, MT (ranks East Helena #3)
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 →