Climate twins of Calvin, ND

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

Top match: Mohall, ND

Month	Calvin			Mohall
	High	Low	Precip	High	Low	Precip
January	17.0°F	-5.3°F	0.47 in	16.4°F	-1.7°F	0.43 in
February	21.4°F	-2.4°F	0.45 in	20.6°F	1.0°F	0.47 in
March	33.5°F	11.8°F	0.92 in	32.9°F	12.9°F	0.73 in
April	51.6°F	27.1°F	0.98 in	51.2°F	26.1°F	1.13 in
May	65.2°F	39.6°F	2.68 in	64.8°F	38.4°F	2.51 in
June	74.8°F	51.3°F	3.71 in	73.9°F	49.6°F	3.76 in
July	80.5°F	54.8°F	2.37 in	79.1°F	54.0°F	2.62 in
August	80.0°F	52.2°F	2.91 in	79.6°F	51.3°F	2.24 in
September	71.4°F	42.9°F	1.76 in	69.2°F	41.9°F	1.70 in
October	54.3°F	30.1°F	1.16 in	52.8°F	29.6°F	1.33 in
November	35.2°F	14.2°F	0.77 in	34.5°F	16.1°F	0.75 in
December	22.1°F	1.9°F	0.79 in	21.1°F	4.0°F	0.55 in

Cities that consider Calvin their climate twin

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

Mohall, ND (ranks Calvin #3)
Sawyer, ND (ranks Calvin #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 →