How dark is the sky in Calera, AL?

Calera's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. That's brighter than 5.2% 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 Calera is from a meaningfully darker sky

The closest place in this dataset with a meaningfully darker sky is Pelham, AL, roughly 14 miles away in a straight line, rated dark sky. Road distance will be more.

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

Calera against the rest of the dataset

About 18,530 people live in Calera, AL, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, Calera ranks 168 from darkest to brightest, 1 being the darkest measured.