How dark is the sky in Florence, AZ?

Florence reads as dark sky on this dataset's scale. Among the darkest skies of any US city in this dataset. The Milky Way should be visible overhead on clear, moonless nights. Only 0.4% of the 3,206 cities measured here read darker than Florence.

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.

Florence is already about as dark as this dataset gets

Nothing in this dataset's 3,206 US cities measures a darker sky than Florence. That doesn't mean nowhere is darker, unincorporated land and wilderness aren't part of this dataset at all, only incorporated cities of 10,000 people or more.

Florence against the rest of the dataset

Florence, AZ has a population of about 24,891, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Florence ranks 13 from darkest to brightest, 1 being the darkest measured.