Climate twins of Union Gap, WA

These are the US cities whose 12-month climate pattern most closely matches Union Gap'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
Hagerman, ID
similarity distance: 0.647 (lower = more similar)
Rank 2 closest
Gooding, ID
similarity distance: 0.647 (lower = more similar)
Rank 3 closest
Bliss, ID
similarity distance: 0.647 (lower = more similar)

Side-by-side: Union Gap vs its climate twin

Top match: Hagerman, ID

Month Union Gap Hagerman
High Low Precip High Low Precip
January 39.5°F 24.0°F 1.19 in 38.1°F 22.2°F 1.32 in
February 47.2°F 26.1°F 0.81 in 44.9°F 24.5°F 0.86 in
March 56.6°F 30.2°F 0.64 in 55.4°F 30.6°F 1.03 in
April 64.7°F 35.2°F 0.55 in 62.4°F 35.4°F 0.83 in
May 74.1°F 43.5°F 0.74 in 72.3°F 43.5°F 1.03 in
June 80.7°F 49.5°F 0.50 in 81.6°F 50.1°F 0.57 in
July 89.9°F 55.0°F 0.20 in 91.9°F 55.9°F 0.15 in
August 88.5°F 53.3°F 0.21 in 90.5°F 52.9°F 0.18 in
September 79.4°F 44.9°F 0.23 in 80.5°F 44.4°F 0.42 in
October 64.4°F 35.3°F 0.64 in 65.9°F 34.9°F 0.73 in
November 48.9°F 27.2°F 0.86 in 49.5°F 27.4°F 1.11 in
December 38.2°F 23.1°F 1.44 in 37.8°F 22.4°F 1.58 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 →