Climate twins of Roundup, MT

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

Top match: Lingle, WY

Month Roundup Lingle
High Low Precip High Low Precip
January 37.2°F 13.1°F 0.37 in 40.5°F 12.4°F 0.28 in
February 40.7°F 14.9°F 0.42 in 42.6°F 13.8°F 0.45 in
March 50.6°F 22.1°F 0.71 in 52.6°F 21.8°F 0.84 in
April 59.9°F 30.0°F 1.71 in 59.9°F 30.1°F 1.73 in
May 69.1°F 39.3°F 2.55 in 68.8°F 39.4°F 2.68 in
June 78.3°F 47.8°F 2.89 in 81.2°F 48.4°F 2.22 in
July 88.9°F 53.5°F 1.70 in 88.5°F 54.2°F 1.87 in
August 87.9°F 51.1°F 1.21 in 86.9°F 51.4°F 1.43 in
September 76.9°F 42.4°F 1.20 in 77.6°F 42.5°F 1.27 in
October 60.9°F 31.7°F 1.22 in 63.2°F 28.5°F 1.18 in
November 46.6°F 21.8°F 0.49 in 50.4°F 18.0°F 0.48 in
December 37.2°F 14.2°F 0.41 in 40.7°F 11.9°F 0.40 in

Cities that consider Roundup their climate twin

These US cities have Roundup in their top 3 most-similar list — meaning if you were to move from any of these places, Roundup 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 →