How dark is the sky in Chelsea, MA?

Satellite radiance puts Chelsea in the inner-city band. Among the brightest skies in this dataset. Usually just the Moon and a few of the brightest stars or planets cut through. That's brighter than 99.4% 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.

The nearest darker sky to Chelsea

Everett, MA, about 1 miles away as the crow flies, measures in the urban band, one step darker than Chelsea. Actual driving distance will run longer than that straight-line figure.

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

Chelsea against the rest of the dataset

Chelsea, MA has a population of about 40,245, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Chelsea ranks 3,170 from darkest to brightest, 1 being the darkest measured.