Climate twins of Chinook, MT

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

Top match: Jordan, MT

Month	Chinook			Jordan
	High	Low	Precip	High	Low	Precip
January	27.1°F	4.2°F	0.45 in	29.9°F	4.6°F	0.30 in
February	31.4°F	6.9°F	0.37 in	34.0°F	7.7°F	0.35 in
March	43.0°F	17.7°F	0.59 in	45.8°F	18.4°F	0.52 in
April	56.9°F	29.4°F	1.04 in	57.6°F	28.9°F	1.36 in
May	67.0°F	40.0°F	2.42 in	67.4°F	38.7°F	2.19 in
June	75.4°F	49.3°F	2.86 in	76.9°F	49.3°F	2.65 in
July	84.3°F	53.6°F	1.62 in	87.1°F	54.8°F	1.65 in
August	83.3°F	51.7°F	1.14 in	86.5°F	52.2°F	1.34 in
September	72.3°F	41.2°F	0.99 in	74.6°F	40.6°F	1.06 in
October	56.9°F	28.5°F	0.88 in	59.4°F	29.4°F	1.16 in
November	41.3°F	17.0°F	0.69 in	44.4°F	17.2°F	0.49 in
December	30.5°F	7.5°F	0.39 in	33.2°F	7.6°F	0.38 in

Cities that consider Chinook their climate twin

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

Bucyrus, ND (ranks Chinook #1)
Gladstone, ND (ranks Chinook #3)
Bowman, ND (ranks Chinook #3)

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 →