Climate twins of St. John, WA

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

Top match: Condon, OR

Month	St. John			Condon
	High	Low	Precip	High	Low	Precip
January	36.6°F	28.7°F	2.05 in	40.2°F	25.8°F	1.81 in
February	41.3°F	30.1°F	1.52 in	44.2°F	27.1°F	1.26 in
March	49.4°F	34.1°F	1.90 in	51.5°F	31.1°F	1.20 in
April	57.2°F	38.2°F	1.54 in	57.9°F	34.7°F	1.30 in
May	66.4°F	44.8°F	1.56 in	66.7°F	41.7°F	1.65 in
June	73.1°F	49.7°F	1.12 in	73.4°F	46.6°F	1.11 in
July	83.6°F	54.4°F	0.43 in	84.1°F	52.6°F	0.39 in
August	83.5°F	53.3°F	0.34 in	83.9°F	52.3°F	0.38 in
September	73.9°F	46.7°F	0.56 in	75.0°F	46.1°F	0.47 in
October	59.0°F	38.6°F	1.50 in	61.2°F	37.3°F	1.17 in
November	44.0°F	33.0°F	2.15 in	48.0°F	30.7°F	1.51 in
December	35.1°F	27.9°F	2.38 in	39.0°F	25.1°F	1.82 in

Cities that consider St. John their climate twin

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

Condon, OR (ranks St. John #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 →