How dark is the sky in Collinsville, IL?

Collinsville's sky measures suburban here. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Collinsville's sky is brighter than 61.8% of the 3,206 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 Collinsville is from a meaningfully darker sky

The closest place in this dataset with a meaningfully darker sky is Fairview Heights, IL, roughly 6 miles away in a straight line, rated suburban edge. Road distance will be more.

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

Collinsville against the rest of the dataset

About 23,766 people live in Collinsville, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, Collinsville ranks 1,971 from darkest to brightest, 1 being the darkest measured.