How dark is the sky in St. Charles, IL?

Satellite radiance puts St. Charles in the suburban edge band. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Only 33.8% of the 3,206 cities measured here read darker than St. Charles.

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.

The nearest darker sky to St. Charles

6 miles from St. Charles, straight-line, sits Campton Hills, IL, the nearest city here with a darker sky than St. Charles's own suburban edge band.

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

St. Charles against the rest of the dataset

About 33,482 people live in St. Charles, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, St. Charles ranks 1,080 from darkest to brightest, 1 being the darkest measured.