Rainbow City, AL Night Sky Brightness
How dark is the sky in Rainbow City, AL?
Satellite radiance puts Rainbow City in the dark sky band. Among the darkest skies of any US city in this dataset. The Milky Way should be visible overhead on clear, moonless nights. Only 1.1% of the 3,206 cities measured here read darker than Rainbow City.
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, covered fully in the Bortle scale guide.
Rainbow City is already about as dark as this dataset gets
Nothing in this dataset's 3,206 US cities measures a darker sky than Rainbow City. 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.
Rainbow City against the rest of the dataset
Rainbow City, AL has a population of about 10,349, one of 3,206 US cities of 10,000 or more residents in this dataset. Ranked against the other 3,206 cities here by the methodology guide's own sampling, Rainbow City comes in at 36, darkest to brightest.