Climate twins of Butte City, ID

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

Top match: Green River, WY

Month	Butte City			Green River
	High	Low	Precip	High	Low	Precip
January	30.3°F	7.0°F	0.67 in	31.0°F	8.1°F	0.69 in
February	34.7°F	11.7°F	0.62 in	36.1°F	12.9°F	0.51 in
March	45.9°F	22.8°F	0.68 in	47.1°F	22.5°F	0.84 in
April	57.2°F	30.4°F	0.86 in	56.4°F	29.3°F	1.32 in
May	67.0°F	38.6°F	1.20 in	66.2°F	37.6°F	1.67 in
June	76.4°F	45.7°F	1.13 in	78.1°F	45.5°F	0.92 in
July	86.6°F	51.6°F	0.32 in	86.6°F	52.9°F	0.49 in
August	84.8°F	49.5°F	0.54 in	85.0°F	50.7°F	0.64 in
September	74.9°F	41.0°F	0.66 in	75.7°F	40.9°F	0.87 in
October	59.5°F	30.5°F	0.71 in	60.7°F	30.3°F	1.04 in
November	42.6°F	19.1°F	0.55 in	43.9°F	19.0°F	0.69 in
December	31.2°F	9.3°F	0.86 in	32.0°F	9.8°F	0.63 in

Cities that consider Butte City their climate twin

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

Green River, WY (ranks Butte City #2)
Superior, WY (ranks Butte City #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 →