Climate twins of Oakley, CA

These are the US cities whose 12-month climate pattern most closely matches Oakley'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
Perris, CA
similarity distance: 1.193 (lower = more similar)
Rank 2 closest
Moreno Valley, CA
similarity distance: 1.193 (lower = more similar)
Rank 3 closest
Exeter, CA
similarity distance: 1.267 (lower = more similar)

Side-by-side: Oakley vs its climate twin

Top match: Perris, CA

Month Oakley Perris
High Low Precip High Low Precip
January 55.7°F 40.3°F 2.68 in 65.8°F 37.4°F 2.05 in
February 60.8°F 43.9°F 2.36 in 66.3°F 37.6°F 2.43 in
March 66.5°F 46.6°F 1.95 in 70.8°F 40.2°F 1.51 in
April 72.1°F 49.5°F 0.91 in 73.9°F 44.2°F 0.76 in
May 79.0°F 54.3°F 0.38 in 79.9°F 50.8°F 0.27 in
June 86.3°F 59.0°F 0.11 in 87.2°F 55.6°F 0.07 in
July 91.4°F 60.6°F 0.00 in 94.1°F 61.6°F 0.13 in
August 90.2°F 60.3°F 0.02 in 94.9°F 61.7°F 0.36 in
September 86.7°F 58.7°F 0.06 in 91.5°F 58.7°F 0.16 in
October 77.5°F 54.2°F 0.42 in 81.9°F 49.1°F 0.47 in
November 64.6°F 46.2°F 1.18 in 72.3°F 40.7°F 0.67 in
December 55.8°F 40.4°F 2.53 in 64.8°F 37.1°F 1.77 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 →