Climate twins of Irvine, CA

These are the US cities whose 12-month climate pattern most closely matches Irvine'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.

Side-by-side: Irvine vs its climate twin

Top match: Concord, CA

Month	Irvine			Concord
	High	Low	Precip	High	Low	Precip
January	67.8°F	43.3°F	3.09 in	57.6°F	41.2°F	3.21 in
February	69.1°F	44.6°F	3.39 in	62.1°F	43.8°F	3.19 in
March	71.7°F	47.8°F	2.11 in	66.7°F	46.6°F	2.26 in
April	74.2°F	49.6°F	0.80 in	71.2°F	49.1°F	1.12 in
May	76.6°F	54.6°F	0.32 in	77.5°F	53.0°F	0.51 in
June	79.6°F	58.2°F	0.09 in	84.2°F	57.1°F	0.16 in
July	85.1°F	61.4°F	0.01 in	88.0°F	58.7°F	0.00 in
August	87.3°F	63.1°F	0.00 in	87.9°F	59.4°F	0.02 in
September	86.8°F	61.1°F	0.18 in	85.3°F	57.8°F	0.06 in
October	83.6°F	54.8°F	0.67 in	78.1°F	52.6°F	0.73 in
November	75.9°F	47.3°F	1.21 in	66.1°F	45.2°F	1.61 in
December	69.9°F	42.8°F	2.25 in	58.2°F	40.7°F	3.18 in

Cities that consider Irvine their climate twin

These US cities have Irvine in their top 3 most-similar list — meaning if you were to move from any of these places, Irvine would feel familiar.

Concord, CA (ranks Irvine #2)

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 →