Climate twins of Fairfield, CA

These are the US cities whose 12-month climate pattern most closely matches Fairfield'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
Ojai, CA
similarity distance: 2.062 (lower = more similar)
Rank 2 closest
Solvang, CA
similarity distance: 2.101 (lower = more similar)
Rank 3 closest
Pasadena, CA
similarity distance: 2.389 (lower = more similar)

Side-by-side: Fairfield vs its climate twin

Top match: Ojai, CA

Month Fairfield Ojai
High Low Precip High Low Precip
January 56.6°F 40.4°F 4.68 in 66.0°F 34.5°F 5.09 in
February 61.6°F 42.9°F 4.97 in 66.9°F 35.8°F 5.24 in
March 66.4°F 45.4°F 3.31 in 69.8°F 38.7°F 3.41 in
April 71.3°F 47.9°F 1.47 in 74.0°F 41.2°F 1.08 in
May 77.8°F 52.2°F 0.74 in 77.4°F 46.0°F 0.54 in
June 85.4°F 56.1°F 0.19 in 82.1°F 49.7°F 0.11 in
July 89.6°F 57.9°F 0.00 in 88.8°F 54.1°F 0.07 in
August 89.2°F 58.0°F 0.03 in 91.2°F 53.5°F 0.00 in
September 86.9°F 56.6°F 0.08 in 88.2°F 51.1°F 0.10 in
October 78.2°F 52.3°F 1.11 in 80.9°F 44.9°F 0.84 in
November 65.6°F 45.2°F 2.55 in 72.7°F 37.4°F 1.32 in
December 56.7°F 40.1°F 5.40 in 65.3°F 33.2°F 2.88 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 →