Climate twins of Fairfield, UT

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: Castleford, ID

Month	Fairfield			Castleford
	High	Low	Precip	High	Low	Precip
January	39.3°F	13.3°F	1.27 in	36.1°F	20.3°F	1.22 in
February	44.5°F	17.6°F	1.33 in	42.1°F	23.1°F	1.05 in
March	56.0°F	24.8°F	1.17 in	52.9°F	28.3°F	0.96 in
April	63.0°F	29.6°F	1.18 in	60.1°F	32.9°F	1.21 in
May	72.1°F	36.8°F	1.37 in	69.5°F	40.6°F	1.43 in
June	82.5°F	43.9°F	0.78 in	78.4°F	47.1°F	0.75 in
July	90.2°F	51.0°F	0.67 in	87.9°F	53.8°F	0.24 in
August	88.6°F	49.4°F	0.66 in	85.9°F	51.9°F	0.34 in
September	80.0°F	40.3°F	0.82 in	76.3°F	44.2°F	0.50 in
October	66.6°F	28.5°F	1.15 in	62.0°F	34.8°F	0.78 in
November	51.8°F	19.8°F	0.79 in	46.5°F	25.6°F	0.94 in
December	40.2°F	13.2°F	1.32 in	35.3°F	19.2°F	1.30 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.

Castleford, ID (ranks Fairfield #1)
Rockland, ID (ranks Fairfield #1)

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 →