Climate twins of Three Forks, MT

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

Top match: Fromberg, MT

Month	Three Forks			Fromberg
	High	Low	Precip	High	Low	Precip
January	33.4°F	15.5°F	0.40 in	35.4°F	12.9°F	0.29 in
February	37.1°F	17.7°F	0.29 in	38.9°F	15.1°F	0.33 in
March	47.8°F	25.9°F	0.66 in	50.4°F	22.4°F	0.47 in
April	56.2°F	32.7°F	1.47 in	57.7°F	29.9°F	1.57 in
May	65.7°F	41.5°F	2.18 in	67.4°F	39.6°F	2.25 in
June	73.9°F	48.5°F	2.36 in	77.3°F	47.0°F	1.80 in
July	84.7°F	53.7°F	1.37 in	87.2°F	53.1°F	0.83 in
August	83.7°F	51.0°F	0.98 in	86.3°F	50.2°F	0.61 in
September	73.3°F	43.3°F	1.10 in	75.3°F	41.5°F	1.15 in
October	58.2°F	33.4°F	0.92 in	59.7°F	31.7°F	1.23 in
November	42.4°F	22.9°F	0.63 in	45.8°F	22.2°F	0.60 in
December	32.9°F	15.2°F	0.67 in	35.9°F	14.2°F	0.37 in

Cities that consider Three Forks their climate twin

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

Big Sandy, MT (ranks Three Forks #3)
Polson, MT (ranks Three Forks #1)
Ronan, MT (ranks Three Forks #1)
Eureka, MT (ranks Three Forks #2)
Rexford, MT (ranks Three Forks #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 →