Pelham, AL Night Sky Brightness
Pelham, AL's night sky, measured from orbit
Pelham's sky measures dark sky here. Among the darkest skies of any US city in this dataset. The Milky Way should be visible overhead on clear, moonless nights. Pelham's sky is brighter than 1.8% of the 3,206 cities in this dataset.
Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things, explained in the Bortle scale guide.
Pelham is already about as dark as this dataset gets
Nothing in this dataset's 3,206 US cities measures a darker sky than Pelham. 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.
How Pelham compares nationally
Pelham, AL has a population of about 25,396, one of 3,206 US cities of 10,000 or more residents in this dataset. Pelham's position, 59 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.