Climate twins of Arthur, ND

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

Top match: Nimrod, MN

Month	Arthur			Nimrod
	High	Low	Precip	High	Low	Precip
January	16.9°F	-1.4°F	0.54 in	18.1°F	-2.8°F	0.43 in
February	21.6°F	2.1°F	0.57 in	23.8°F	0.8°F	0.40 in
March	35.0°F	16.6°F	1.09 in	36.9°F	15.6°F	1.00 in
April	52.8°F	30.6°F	1.49 in	52.6°F	29.3°F	1.72 in
May	67.6°F	43.2°F	3.16 in	66.5°F	41.9°F	3.09 in
June	77.0°F	54.9°F	4.43 in	75.7°F	52.8°F	4.08 in
July	80.8°F	58.6°F	3.69 in	80.2°F	57.1°F	3.93 in
August	79.9°F	55.8°F	2.62 in	78.6°F	54.8°F	2.78 in
September	71.4°F	46.4°F	2.79 in	69.2°F	46.3°F	2.70 in
October	55.6°F	33.8°F	2.33 in	53.6°F	33.5°F	2.40 in
November	37.8°F	19.7°F	0.80 in	36.4°F	19.3°F	0.81 in
December	23.2°F	6.6°F	0.69 in	23.1°F	5.4°F	0.52 in

Cities that consider Arthur their climate twin

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

Estelline, SD (ranks Arthur #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 →