Climate twins of Joliet, MT

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

Top match: Buffalo, WY

Month Joliet Buffalo
High Low Precip High Low Precip
January 35.9°F 9.8°F 0.53 in 36.0°F 10.7°F 0.44 in
February 38.6°F 12.0°F 0.57 in 36.5°F 11.9°F 0.53 in
March 49.0°F 19.1°F 0.84 in 46.5°F 19.9°F 0.72 in
April 56.5°F 26.6°F 1.89 in 53.4°F 27.6°F 1.49 in
May 65.7°F 36.3°F 2.67 in 62.4°F 37.0°F 2.80 in
June 75.8°F 44.3°F 2.11 in 73.0°F 45.9°F 2.16 in
July 85.7°F 49.9°F 0.94 in 82.8°F 53.1°F 1.39 in
August 84.3°F 47.9°F 0.88 in 81.8°F 50.8°F 0.75 in
September 73.7°F 39.3°F 1.26 in 71.8°F 41.7°F 1.28 in
October 58.8°F 28.6°F 1.57 in 57.2°F 29.6°F 1.25 in
November 45.3°F 18.9°F 0.70 in 44.9°F 19.4°F 0.51 in
December 35.8°F 11.1°F 0.58 in 36.3°F 11.0°F 0.43 in

Cities that consider Joliet their climate twin

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