Climate twins of Hillsboro, ND

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

Top match: Watertown, SD

Month	Hillsboro			Watertown
	High	Low	Precip	High	Low	Precip
January	17.9°F	1.0°F	0.55 in	21.4°F	3.1°F	0.58 in
February	22.5°F	4.2°F	0.59 in	25.9°F	6.7°F	0.65 in
March	35.9°F	19.5°F	1.20 in	38.6°F	19.6°F	1.00 in
April	53.0°F	33.7°F	1.39 in	54.0°F	31.5°F	2.06 in
May	67.7°F	45.8°F	2.77 in	66.9°F	44.5°F	2.87 in
June	77.0°F	57.3°F	3.65 in	76.8°F	55.4°F	3.85 in
July	81.3°F	61.1°F	3.43 in	82.0°F	60.0°F	3.05 in
August	80.2°F	58.4°F	2.59 in	79.5°F	57.5°F	2.89 in
September	71.3°F	49.7°F	2.16 in	71.6°F	48.6°F	2.45 in
October	55.2°F	36.8°F	2.21 in	56.2°F	35.2°F	1.95 in
November	38.2°F	22.3°F	0.86 in	39.8°F	21.3°F	0.68 in
December	23.7°F	9.4°F	0.91 in	26.3°F	9.3°F	0.68 in

Cities that consider Hillsboro their climate twin

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

Fredonia, ND (ranks Hillsboro #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 →