St. Marys, GA Night Sky Brightness
St. Marys, GA's night sky, measured from orbit
St. Marys's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. St. Marys's sky is brighter than 12.2% 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.
How far St. Marys is from a meaningfully darker sky
The closest place in this dataset with a meaningfully darker sky is Bluffton, SC, roughly 108 miles away in a straight line, rated dark sky. Road distance will be more.
Bluffton, SC is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How St. Marys compares nationally
About 20,119 people live in St. Marys, GA, sized enough to appear in this dataset of 3,206 incorporated US cities. St. Marys's position, 390 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.