Climate twins of Jamestown, ND

These are the US cities whose 12-month climate pattern most closely matches Jamestown'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
Sabin, MN
similarity distance: 0.953 (lower = more similar)
Rank 2 closest
Nevis, MN
similarity distance: 1.004 (lower = more similar)
Rank 3 closest
Menahga, MN
similarity distance: 1.004 (lower = more similar)

Side-by-side: Jamestown vs its climate twin

Top match: Sabin, MN

Month Jamestown Sabin
High Low Precip High Low Precip
January 18.4°F 0.4°F 0.50 in 17.3°F -2.1°F 0.67 in
February 23.0°F 4.2°F 0.46 in 22.0°F 1.2°F 0.66 in
March 35.9°F 16.7°F 0.74 in 35.2°F 16.4°F 1.15 in
April 52.7°F 29.4°F 1.22 in 52.9°F 30.4°F 1.58 in
May 66.9°F 42.5°F 3.44 in 68.1°F 44.0°F 3.10 in
June 76.5°F 53.9°F 3.62 in 77.4°F 55.1°F 4.33 in
July 81.6°F 58.5°F 3.59 in 81.6°F 59.5°F 3.71 in
August 80.3°F 55.7°F 2.28 in 80.2°F 57.1°F 2.74 in
September 71.2°F 46.2°F 2.24 in 71.6°F 47.3°F 2.50 in
October 54.8°F 33.3°F 1.89 in 55.5°F 34.0°F 2.24 in
November 37.5°F 19.3°F 0.52 in 38.3°F 19.9°F 0.89 in
December 23.6°F 7.6°F 0.62 in 23.9°F 6.6°F 0.83 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 →