Climate twins of Riverside, CA

These are the US cities whose 12-month climate pattern most closely matches Riverside'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
Newman, CA
similarity distance: 1.386 (lower = more similar)
Rank 2 closest
Gustine, CA
similarity distance: 1.386 (lower = more similar)
Rank 3 closest
Livingston, CA
similarity distance: 1.573 (lower = more similar)

Side-by-side: Riverside vs its climate twin

Top match: Newman, CA

Month Riverside Newman
High Low Precip High Low Precip
January 69.8°F 43.0°F 2.19 in 60.1°F 38.2°F 2.66 in
February 69.7°F 44.1°F 2.47 in 66.6°F 40.8°F 2.23 in
March 73.1°F 46.2°F 1.58 in 73.0°F 43.6°F 1.76 in
April 78.2°F 49.7°F 0.58 in 79.7°F 46.3°F 0.71 in
May 81.4°F 54.7°F 0.20 in 88.0°F 52.1°F 0.45 in
June 88.9°F 59.2°F 0.08 in 95.7°F 57.5°F 0.07 in
July 95.3°F 63.7°F 0.12 in 100.0°F 61.6°F 0.00 in
August 96.8°F 64.5°F 0.13 in 98.2°F 60.4°F 0.00 in
September 93.0°F 61.8°F 0.15 in 94.9°F 57.3°F 0.04 in
October 84.3°F 54.5°F 0.44 in 85.1°F 50.0°F 0.59 in
November 76.3°F 46.5°F 0.68 in 70.7°F 42.4°F 1.06 in
December 69.1°F 42.1°F 1.40 in 60.4°F 37.8°F 2.14 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 →