Climate twins of Forsyth, MT

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

Top match: Camp Crook, SD

Month	Forsyth			Camp Crook
	High	Low	Precip	High	Low	Precip
January	33.7°F	10.2°F	0.61 in	33.5°F	10.5°F	0.31 in
February	38.0°F	13.5°F	0.58 in	36.5°F	12.8°F	0.45 in
March	49.3°F	23.3°F	0.94 in	47.7°F	21.7°F	0.70 in
April	59.2°F	32.9°F	1.85 in	58.3°F	31.2°F	1.61 in
May	68.8°F	42.8°F	2.92 in	68.6°F	41.5°F	2.87 in
June	78.5°F	52.0°F	2.54 in	78.8°F	51.2°F	2.91 in
July	88.0°F	58.2°F	1.38 in	88.4°F	57.3°F	2.06 in
August	86.5°F	55.8°F	1.19 in	87.5°F	54.7°F	1.60 in
September	75.4°F	45.6°F	1.38 in	77.8°F	44.6°F	1.19 in
October	60.0°F	33.7°F	1.37 in	61.1°F	32.9°F	1.27 in
November	46.1°F	21.7°F	0.66 in	46.2°F	21.7°F	0.48 in
December	35.4°F	12.6°F	0.58 in	35.5°F	13.3°F	0.34 in

Cities that consider Forsyth their climate twin

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

Laurel, MT (ranks Forsyth #2)
Cottonwood, SD (ranks Forsyth #3)
Quinn, SD (ranks Forsyth #2)
Newell, SD (ranks Forsyth #3)
Nisland, SD (ranks Forsyth #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 →