Climate twins of Cascade, MT

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

Top match: Grass Range, MT

Month	Cascade			Grass Range
	High	Low	Precip	High	Low	Precip
January	38.9°F	18.7°F	0.54 in	37.2°F	14.2°F	0.68 in
February	40.4°F	18.5°F	0.69 in	38.8°F	15.7°F	0.51 in
March	49.4°F	25.0°F	0.80 in	48.2°F	23.0°F	0.87 in
April	57.9°F	32.8°F	2.23 in	57.1°F	30.7°F	1.85 in
May	67.0°F	40.2°F	2.98 in	66.0°F	39.5°F	3.39 in
June	74.7°F	47.4°F	2.90 in	74.0°F	47.4°F	3.22 in
July	85.7°F	51.7°F	1.17 in	83.3°F	52.9°F	1.70 in
August	85.0°F	49.9°F	1.17 in	82.7°F	51.9°F	1.67 in
September	74.3°F	43.5°F	1.63 in	72.6°F	43.5°F	1.46 in
October	59.9°F	35.6°F	1.37 in	58.9°F	33.4°F	1.25 in
November	46.6°F	27.1°F	0.71 in	46.3°F	22.7°F	0.71 in
December	38.3°F	19.9°F	0.69 in	37.7°F	15.2°F	0.55 in

Cities that consider Cascade their climate twin

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

Grass Range, MT (ranks Cascade #1)
St. Ignatius, MT (ranks Cascade #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 →