Climate twins of Mattawa, WA

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

Top match: Melba, ID

Month	Mattawa			Melba
	High	Low	Precip	High	Low	Precip
January	40.6°F	29.6°F	1.08 in	41.6°F	25.7°F	0.87 in
February	46.9°F	32.1°F	0.62 in	49.0°F	29.2°F	0.59 in
March	56.9°F	37.9°F	0.74 in	58.7°F	35.9°F	0.82 in
April	65.4°F	44.8°F	0.55 in	65.6°F	41.1°F	0.75 in
May	75.2°F	52.7°F	0.55 in	75.2°F	49.7°F	1.31 in
June	82.0°F	59.6°F	0.54 in	84.1°F	57.0°F	0.62 in
July	91.6°F	66.5°F	0.21 in	94.6°F	65.0°F	0.19 in
August	90.2°F	65.9°F	0.08 in	93.3°F	62.6°F	0.19 in
September	80.4°F	57.7°F	0.15 in	83.1°F	52.8°F	0.27 in
October	65.3°F	46.4°F	0.65 in	68.2°F	41.7°F	0.58 in
November	49.9°F	36.2°F	0.91 in	52.0°F	31.2°F	0.80 in
December	40.9°F	29.9°F	1.40 in	41.7°F	25.7°F	0.93 in

Cities that consider Mattawa their climate twin

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

Melba, ID (ranks Mattawa #1)
Fernley, NV (ranks Mattawa #1)
Bishop, CA (ranks Mattawa #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 →