Climate twins of Castle Dale, UT

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

Top match: Silt, CO

Month	Castle Dale			Silt
	High	Low	Precip	High	Low	Precip
January	40.4°F	9.7°F	0.63 in	36.8°F	13.4°F	0.70 in
February	46.9°F	16.1°F	0.64 in	43.5°F	19.8°F	0.60 in
March	58.4°F	24.7°F	0.59 in	55.4°F	27.0°F	0.76 in
April	65.7°F	30.8°F	0.54 in	62.9°F	32.6°F	1.01 in
May	74.6°F	39.5°F	0.72 in	74.3°F	40.2°F	1.14 in
June	85.3°F	47.0°F	0.45 in	86.4°F	47.9°F	0.68 in
July	91.4°F	54.1°F	0.59 in	92.1°F	55.3°F	0.96 in
August	88.6°F	52.2°F	0.92 in	88.9°F	53.6°F	1.07 in
September	81.1°F	42.8°F	1.03 in	80.0°F	45.0°F	1.34 in
October	68.1°F	31.7°F	0.97 in	65.5°F	33.6°F	1.27 in
November	53.0°F	20.0°F	0.46 in	49.7°F	23.3°F	0.63 in
December	41.0°F	11.2°F	0.47 in	37.3°F	14.0°F	0.57 in

Cities that consider Castle Dale their climate twin

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

Dinosaur, CO (ranks Castle Dale #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 →