Climate twins of Richland, WA

These are the US cities whose 12-month climate pattern most closely matches Richland'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: Richland vs its climate twin

Top match: Grand View, ID

Month	Richland			Grand View
	High	Low	Precip	High	Low	Precip
January	40.6°F	28.8°F	1.04 in	41.4°F	23.3°F	0.75 in
February	47.5°F	30.1°F	0.67 in	49.0°F	26.8°F	0.49 in
March	57.1°F	35.1°F	0.64 in	59.5°F	32.1°F	0.69 in
April	65.1°F	41.0°F	0.62 in	66.6°F	37.6°F	0.65 in
May	73.9°F	48.3°F	0.63 in	76.0°F	46.0°F	0.90 in
June	80.2°F	54.4°F	0.56 in	84.4°F	52.7°F	0.57 in
July	89.3°F	60.0°F	0.23 in	93.3°F	58.2°F	0.26 in
August	88.1°F	59.0°F	0.13 in	92.2°F	55.3°F	0.20 in
September	78.9°F	51.4°F	0.29 in	82.5°F	47.0°F	0.24 in
October	64.3°F	41.7°F	0.54 in	67.8°F	36.9°F	0.44 in
November	49.0°F	33.6°F	0.87 in	51.2°F	28.1°F	0.61 in
December	39.9°F	28.4°F	1.07 in	39.9°F	23.2°F	0.88 in

Cities that consider Richland their climate twin

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

Sparks, NV (ranks Richland #2)
Yerington, NV (ranks Richland #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 →