Climate twins of Fairfield, MT

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

Top match: Harlowton, MT

Month	Fairfield			Harlowton
	High	Low	Precip	High	Low	Precip
January	35.7°F	16.5°F	0.34 in	35.7°F	13.3°F	0.31 in
February	36.4°F	17.1°F	0.43 in	38.2°F	14.1°F	0.30 in
March	44.8°F	23.9°F	0.60 in	47.5°F	19.8°F	0.55 in
April	52.8°F	31.5°F	1.36 in	54.3°F	27.8°F	1.34 in
May	62.3°F	40.7°F	2.12 in	64.3°F	37.1°F	2.53 in
June	69.5°F	47.6°F	2.63 in	73.6°F	45.5°F	2.81 in
July	79.7°F	53.3°F	1.08 in	83.9°F	49.9°F	1.42 in
August	79.0°F	51.9°F	1.05 in	83.2°F	48.4°F	1.25 in
September	68.5°F	44.0°F	1.23 in	72.5°F	39.6°F	1.07 in
October	55.3°F	33.9°F	0.74 in	57.4°F	29.5°F	0.68 in
November	42.7°F	24.9°F	0.46 in	44.6°F	20.6°F	0.51 in
December	35.3°F	17.9°F	0.33 in	35.4°F	14.7°F	0.41 in

Cities that consider Fairfield their climate twin

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

Harlowton, MT (ranks Fairfield #2)
Sheridan, MT (ranks Fairfield #3)
Hobson, MT (ranks Fairfield #3)
Twin Bridges, MT (ranks Fairfield #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 →