How dark is the sky in Johnstown, PA?

Johnstown's sky measures suburban here. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 69.1% of the 3,206 cities measured here read darker than Johnstown.

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 Johnstown

The closest place in this dataset with a meaningfully darker sky is Murrysville, PA, roughly 40 miles away in a straight line, rated rural. Road distance will be more.

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

Johnstown against the rest of the dataset

Johnstown, PA has a population of about 17,853, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Johnstown ranks 2,203 from darkest to brightest, 1 being the darkest measured.