Climate twins of Fox River Grove, IL

These are the US cities whose 12-month climate pattern most closely matches Fox River Grove'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
Oneida, IL
similarity distance: 0.977 (lower = more similar)
Rank 2 closest
Columbus Junction, IA
similarity distance: 1.014 (lower = more similar)
Rank 3 closest
Columbus City, IA
similarity distance: 1.014 (lower = more similar)

Side-by-side: Fox River Grove vs its climate twin

Top match: Oneida, IL

Month Fox River Grove Oneida
High Low Precip High Low Precip
January 28.7°F 13.4°F 2.07 in 29.9°F 13.0°F 1.82 in
February 32.8°F 16.4°F 1.90 in 35.3°F 15.8°F 2.07 in
March 44.5°F 26.5°F 2.35 in 48.1°F 26.5°F 2.58 in
April 57.5°F 37.2°F 3.95 in 61.5°F 36.9°F 4.00 in
May 68.5°F 48.3°F 5.15 in 72.0°F 49.2°F 5.21 in
June 77.5°F 58.1°F 4.60 in 80.5°F 58.9°F 4.72 in
July 81.3°F 62.6°F 4.02 in 83.4°F 61.8°F 3.98 in
August 79.2°F 61.2°F 4.58 in 81.9°F 59.3°F 3.76 in
September 72.4°F 53.6°F 3.65 in 76.3°F 51.6°F 3.81 in
October 60.1°F 41.5°F 3.39 in 63.9°F 39.8°F 2.77 in
November 46.3°F 30.2°F 2.58 in 48.5°F 28.1°F 2.56 in
December 34.2°F 19.7°F 2.19 in 35.4°F 18.7°F 2.10 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 →