Climate twins of Rock Springs, WY

These are the US cities whose 12-month climate pattern most closely matches Rock Springs'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
Shelley, ID
similarity distance: 0.782 (lower = more similar)
Rank 2 closest
Rexburg, ID
similarity distance: 0.901 (lower = more similar)
Rank 3 closest
Dubois, ID
similarity distance: 0.902 (lower = more similar)

Side-by-side: Rock Springs vs its climate twin

Top match: Shelley, ID

Month Rock Springs Shelley
High Low Precip High Low Precip
January 34.6°F 12.4°F 0.45 in 28.7°F 12.1°F 0.67 in
February 37.9°F 15.1°F 0.43 in 34.2°F 15.7°F 0.56 in
March 48.6°F 23.4°F 0.61 in 47.2°F 25.3°F 0.81 in
April 56.8°F 29.5°F 1.07 in 57.5°F 31.4°F 1.03 in
May 67.3°F 37.4°F 1.88 in 67.2°F 38.4°F 1.57 in
June 78.6°F 45.2°F 0.82 in 76.2°F 44.6°F 1.09 in
July 86.3°F 52.5°F 0.92 in 86.6°F 49.3°F 0.46 in
August 84.4°F 50.7°F 0.89 in 85.6°F 47.5°F 0.59 in
September 75.0°F 41.2°F 1.17 in 74.8°F 40.6°F 0.97 in
October 61.3°F 31.4°F 1.03 in 59.1°F 30.8°F 0.88 in
November 44.7°F 20.7°F 0.66 in 43.0°F 21.9°F 0.66 in
December 33.2°F 12.4°F 0.52 in 30.3°F 13.4°F 0.78 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 →