Climate twins of Porterville, CA

These are the US cities whose 12-month climate pattern most closely matches Porterville'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
Menifee, CA
similarity distance: 1.437 (lower = more similar)
Rank 2 closest
Lake Elsinore, CA
similarity distance: 1.437 (lower = more similar)
Rank 3 closest
Canyon Lake, CA
similarity distance: 1.437 (lower = more similar)

Side-by-side: Porterville vs its climate twin

Top match: Menifee, CA

Month Porterville Menifee
High Low Precip High Low Precip
January 59.1°F 39.7°F 2.08 in 65.7°F 41.9°F 2.97 in
February 64.6°F 43.1°F 1.92 in 67.1°F 42.7°F 2.85 in
March 70.5°F 46.6°F 2.04 in 71.5°F 45.8°F 1.49 in
April 76.0°F 49.7°F 0.95 in 76.5°F 48.7°F 0.54 in
May 84.1°F 56.3°F 0.34 in 82.0°F 53.8°F 0.21 in
June 92.7°F 62.5°F 0.10 in 90.2°F 58.3°F 0.07 in
July 98.4°F 68.4°F 0.05 in 96.5°F 64.1°F 0.18 in
August 97.1°F 66.7°F 0.00 in 97.8°F 64.8°F 0.06 in
September 92.3°F 62.3°F 0.06 in 93.2°F 61.2°F 0.17 in
October 82.0°F 53.4°F 0.55 in 83.1°F 53.9°F 0.51 in
November 68.4°F 44.3°F 0.95 in 73.2°F 45.9°F 0.59 in
December 59.2°F 38.8°F 1.93 in 65.0°F 40.3°F 2.01 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 →