Sioux City, IA Night Sky Brightness
Sioux City, IA's night sky, measured from orbit
Sioux City reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Sioux City's sky is brighter than 95.7% of the 3,206 cities in this dataset.
Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things, explained in the Bortle scale guide.
The nearest darker sky to Sioux City
3 miles from Sioux City, straight-line, sits South Sioux City, NE, the nearest city here with a darker sky than Sioux City's own urban band.
South Sioux City, NE is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Sioux City compares nationally
Sioux City, IA counts roughly 86,875 residents, among the 3,206 US cities this site tracks. Sioux City's position, 3,050 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.