Climate twins of Ennis, MT

These are the US cities whose 12-month climate pattern most closely matches Ennis'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.

Rank 1 closest
Choteau, MT
similarity distance: 0.873 (lower = more similar)
Rank 2 closest
Dutton, MT
similarity distance: 0.980 (lower = more similar)
Rank 3 closest
Evanston, WY
similarity distance: 1.007 (lower = more similar)

Side-by-side: Ennis vs its climate twin

Top match: Choteau, MT

Month Ennis Choteau
High Low Precip High Low Precip
January 34.0°F 15.1°F 0.45 in 37.4°F 13.4°F 0.28 in
February 37.1°F 15.3°F 0.51 in 38.9°F 14.2°F 0.41 in
March 46.4°F 21.7°F 0.84 in 47.0°F 21.0°F 0.52 in
April 54.6°F 27.6°F 1.47 in 55.8°F 28.9°F 1.15 in
May 64.1°F 34.7°F 1.93 in 65.1°F 37.0°F 2.14 in
June 72.6°F 40.7°F 2.23 in 72.3°F 44.1°F 2.75 in
July 82.8°F 45.5°F 1.16 in 82.0°F 48.3°F 0.99 in
August 82.1°F 43.6°F 1.02 in 81.0°F 46.9°F 1.06 in
September 72.2°F 37.1°F 0.97 in 71.6°F 39.8°F 1.16 in
October 57.6°F 29.0°F 1.14 in 58.0°F 30.6°F 0.74 in
November 42.7°F 21.6°F 0.69 in 45.0°F 21.6°F 0.41 in
December 33.2°F 14.5°F 0.54 in 37.4°F 14.6°F 0.32 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 →