Climate twins of Westport, MN

These are the US cities whose 12-month climate pattern most closely matches Westport'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
Ortley, SD
similarity distance: 0.726 (lower = more similar)
Rank 2 closest
Lake Preston, SD
similarity distance: 0.844 (lower = more similar)
Rank 3 closest
De Smet, SD
similarity distance: 0.844 (lower = more similar)

Side-by-side: Westport vs its climate twin

Top match: Ortley, SD

Month Westport Ortley
High Low Precip High Low Precip
January 22.6°F 1.5°F 0.48 in 20.7°F 2.1°F 0.65 in
February 27.3°F 5.2°F 0.52 in 25.7°F 6.1°F 0.69 in
March 40.2°F 18.6°F 1.14 in 38.7°F 18.4°F 1.03 in
April 56.9°F 30.9°F 2.12 in 54.6°F 30.3°F 2.34 in
May 70.4°F 43.5°F 2.99 in 68.2°F 42.8°F 3.16 in
June 78.9°F 53.6°F 4.31 in 77.1°F 53.5°F 3.95 in
July 82.9°F 57.9°F 4.13 in 81.9°F 58.1°F 4.07 in
August 81.1°F 55.5°F 3.74 in 80.4°F 56.3°F 2.97 in
September 73.5°F 47.2°F 2.93 in 73.0°F 47.9°F 2.77 in
October 58.8°F 34.2°F 2.46 in 57.5°F 34.4°F 2.51 in
November 41.4°F 20.8°F 0.96 in 39.8°F 20.7°F 0.90 in
December 28.0°F 8.2°F 0.66 in 25.7°F 8.6°F 0.66 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 →