Climate twins of Fort Collins, CO

These are the US cities whose 12-month climate pattern most closely matches Fort Collins'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
Crook, CO
similarity distance: 1.251 (lower = more similar)
Rank 2 closest
Laurel, MT
similarity distance: 1.281 (lower = more similar)
Rank 3 closest
Billings, MT
similarity distance: 1.317 (lower = more similar)

Side-by-side: Fort Collins vs its climate twin

Top match: Crook, CO

Month Fort Collins Crook
High Low Precip High Low Precip
January 45.0°F 18.3°F 0.41 in 44.0°F 13.2°F 0.31 in
February 46.8°F 20.7°F 0.47 in 46.9°F 15.6°F 0.50 in
March 56.4°F 28.5°F 1.31 in 57.4°F 23.6°F 0.89 in
April 62.5°F 35.4°F 2.10 in 64.5°F 31.3°F 1.80 in
May 70.9°F 44.1°F 2.72 in 73.4°F 41.9°F 2.75 in
June 81.8°F 52.8°F 1.90 in 85.4°F 52.3°F 2.63 in
July 87.4°F 58.7°F 1.63 in 91.9°F 58.2°F 2.61 in
August 85.0°F 56.5°F 1.45 in 89.9°F 55.9°F 2.09 in
September 77.4°F 48.0°F 1.43 in 81.8°F 46.7°F 1.38 in
October 64.3°F 36.1°F 1.25 in 68.1°F 33.5°F 1.16 in
November 52.5°F 26.1°F 0.74 in 55.4°F 21.8°F 0.45 in
December 44.0°F 18.3°F 0.47 in 44.3°F 13.6°F 0.33 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 →