Climate twins of Prosser, WA

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

Top match: Marsing, ID

Month	Prosser			Marsing
	High	Low	Precip	High	Low	Precip
January	40.1°F	26.8°F	1.24 in	39.8°F	24.5°F	1.22 in
February	46.7°F	28.6°F	0.90 in	47.4°F	27.3°F	0.99 in
March	55.9°F	34.9°F	0.69 in	58.4°F	33.8°F	1.10 in
April	64.6°F	39.9°F	0.74 in	64.5°F	38.4°F	1.06 in
May	74.1°F	47.9°F	0.88 in	73.1°F	46.0°F	1.15 in
June	80.9°F	53.6°F	0.68 in	80.9°F	52.1°F	0.70 in
July	90.4°F	59.5°F	0.21 in	89.9°F	59.2°F	0.29 in
August	89.2°F	57.7°F	0.16 in	89.1°F	57.0°F	0.19 in
September	79.7°F	50.1°F	0.27 in	80.0°F	49.0°F	0.37 in
October	64.7°F	40.8°F	0.77 in	66.4°F	39.2°F	0.75 in
November	49.3°F	31.7°F	0.86 in	50.3°F	30.5°F	1.07 in
December	39.5°F	26.3°F	1.33 in	40.1°F	24.0°F	1.11 in

Cities that consider Prosser their climate twin

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

Marsing, ID (ranks Prosser #1)
Payette, ID (ranks Prosser #1)

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 →