Climate twins of Summit, SD

These are the US cities whose 12-month climate pattern most closely matches Summit'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: Summit vs its climate twin

Top match: Motley, MN

Month Summit Motley
High Low Precip High Low Precip
January 20.7°F 2.1°F 0.65 in 17.8°F -1.2°F 0.63 in
February 25.7°F 6.1°F 0.69 in 23.8°F 2.8°F 0.60 in
March 38.7°F 18.4°F 1.03 in 36.5°F 16.3°F 1.24 in
April 54.6°F 30.3°F 2.34 in 51.0°F 30.7°F 2.38 in
May 68.2°F 42.8°F 3.16 in 65.2°F 45.2°F 3.41 in
June 77.1°F 53.5°F 3.95 in 74.6°F 56.0°F 4.11 in
July 81.9°F 58.1°F 4.07 in 78.9°F 61.0°F 4.36 in
August 80.4°F 56.3°F 2.97 in 76.8°F 58.7°F 3.31 in
September 73.0°F 47.9°F 2.77 in 67.6°F 49.4°F 2.66 in
October 57.5°F 34.4°F 2.51 in 53.2°F 35.7°F 2.63 in
November 39.8°F 20.7°F 0.90 in 37.3°F 22.4°F 1.03 in
December 25.7°F 8.6°F 0.66 in 23.6°F 7.9°F 0.74 in

Cities that consider Summit their climate twin

These US cities have Summit in their top 3 most-similar list — meaning if you were to move from any of these places, Summit would feel familiar.

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 →