Climate twins of Fairmont City, IL

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

Top match: St. Elizabeth, MO

Month Fairmont City St. Elizabeth
High Low Precip High Low Precip
January 40.2°F 24.1°F 2.46 in 41.1°F 20.7°F 2.40 in
February 45.6°F 27.6°F 1.96 in 46.5°F 24.8°F 2.21 in
March 56.3°F 36.0°F 3.27 in 56.3°F 33.7°F 3.32 in
April 67.5°F 45.5°F 4.48 in 66.9°F 43.7°F 4.79 in
May 76.7°F 56.5°F 4.84 in 75.2°F 54.6°F 4.93 in
June 85.7°F 64.7°F 4.36 in 83.1°F 63.5°F 4.15 in
July 89.0°F 68.8°F 3.70 in 87.9°F 67.5°F 3.99 in
August 87.8°F 66.1°F 3.68 in 87.2°F 65.8°F 3.69 in
September 80.7°F 57.1°F 3.36 in 79.8°F 56.7°F 3.86 in
October 69.4°F 46.1°F 3.07 in 69.0°F 46.1°F 3.34 in
November 55.3°F 35.9°F 3.34 in 55.6°F 34.6°F 3.64 in
December 44.3°F 28.6°F 2.32 in 44.7°F 25.9°F 2.64 in

Cities that consider Fairmont City their climate twin

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