How dark is the sky in Coralville, IA?

Coralville reads as suburban edge on this dataset's scale. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. That's brighter than 39.8% of the 3,206 US cities in this dataset.

Worth remembering: this is satellite radiance, not a ground observation. A true Bortle rating needs a human eye at night, this is the closest large-scale substitute.

How far Coralville is from a meaningfully darker sky

Clinton, IA, about 70 miles away as the crow flies, measures in the rural band, one step darker than Coralville. Actual driving distance will run longer than that straight-line figure.

Clinton, IA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

Coralville against the rest of the dataset

Coralville, IA has a population of about 23,959, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Coralville ranks 1,271 from darkest to brightest, 1 being the darkest measured.