Climate twins of Naples, IL

These are the US cities whose 12-month climate pattern most closely matches Naples'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
Allenville, IL
similarity distance: 0.724 (lower = more similar)
Rank 2 closest
Gaston, IN
similarity distance: 0.762 (lower = more similar)
Rank 3 closest
Eaton, IN
similarity distance: 0.762 (lower = more similar)

Side-by-side: Naples vs its climate twin

Top match: Allenville, IL

Month Naples Allenville
High Low Precip High Low Precip
January 35.7°F 17.8°F 2.26 in 35.3°F 18.5°F 2.41 in
February 41.1°F 21.3°F 2.14 in 40.2°F 21.9°F 2.23 in
March 52.5°F 30.5°F 3.06 in 51.2°F 31.1°F 2.83 in
April 65.1°F 41.0°F 4.40 in 64.7°F 41.9°F 4.48 in
May 74.9°F 52.1°F 4.81 in 74.6°F 53.4°F 4.98 in
June 83.6°F 61.8°F 4.99 in 83.2°F 62.7°F 4.95 in
July 86.8°F 65.1°F 3.97 in 86.0°F 65.2°F 4.35 in
August 86.1°F 62.8°F 3.47 in 85.1°F 62.3°F 3.16 in
September 80.1°F 53.8°F 3.03 in 80.1°F 54.6°F 2.71 in
October 67.8°F 42.5°F 3.09 in 67.3°F 43.9°F 3.30 in
November 52.7°F 31.6°F 2.75 in 52.1°F 33.0°F 3.45 in
December 40.9°F 23.3°F 2.43 in 40.3°F 24.5°F 2.75 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 →