Climate twins of Fort Sumner, NM

These are the US cities whose 12-month climate pattern most closely matches Fort Sumner'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
Anton, TX
similarity distance: 1.425 (lower = more similar)
Rank 2 closest
Olton, TX
similarity distance: 1.433 (lower = more similar)
Rank 3 closest
Cactus, TX
similarity distance: 1.439 (lower = more similar)

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

Top match: Anton, TX

Month Fort Sumner Anton
High Low Precip High Low Precip
January 54.9°F 24.6°F 0.45 in 53.9°F 22.9°F 0.65 in
February 59.5°F 28.3°F 0.49 in 58.4°F 25.8°F 0.61 in
March 67.4°F 35.4°F 0.69 in 66.6°F 32.8°F 1.15 in
April 74.2°F 42.9°F 1.44 in 74.7°F 40.6°F 1.05 in
May 81.8°F 52.4°F 1.17 in 83.1°F 51.6°F 2.01 in
June 90.5°F 62.3°F 1.46 in 91.0°F 61.1°F 2.87 in
July 91.7°F 66.2°F 2.56 in 92.5°F 64.4°F 2.22 in
August 89.9°F 64.6°F 2.31 in 90.7°F 63.1°F 2.35 in
September 83.7°F 56.7°F 1.63 in 84.0°F 55.3°F 2.28 in
October 74.3°F 44.4°F 1.87 in 74.9°F 43.1°F 1.31 in
November 63.1°F 32.6°F 0.39 in 63.1°F 31.5°F 0.74 in
December 54.7°F 24.9°F 0.62 in 54.3°F 24.3°F 0.77 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 →