Climate twins of Valley Springs, SD

These are the US cities whose 12-month climate pattern most closely matches Valley 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.

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

Top match: Port Edwards, WI

Month Valley Springs Port Edwards
High Low Precip High Low Precip
January 24.2°F 6.4°F 0.71 in 24.5°F 7.7°F 0.95 in
February 29.0°F 10.7°F 0.89 in 29.1°F 10.5°F 0.90 in
March 41.9°F 22.8°F 1.80 in 41.5°F 21.7°F 1.96 in
April 56.6°F 34.1°F 3.26 in 55.7°F 32.9°F 2.98 in
May 69.3°F 46.7°F 3.79 in 68.5°F 44.6°F 3.68 in
June 78.8°F 57.5°F 4.99 in 78.1°F 54.8°F 4.58 in
July 82.7°F 60.6°F 3.44 in 82.4°F 58.8°F 3.56 in
August 79.6°F 58.7°F 3.23 in 79.7°F 57.1°F 3.83 in
September 73.2°F 49.2°F 3.08 in 71.8°F 48.7°F 3.43 in
October 59.0°F 36.6°F 2.30 in 57.9°F 37.1°F 2.51 in
November 42.4°F 23.0°F 1.27 in 42.5°F 25.6°F 1.70 in
December 29.0°F 11.8°F 0.86 in 29.5°F 14.2°F 1.22 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 →