Lake St. Louis, MO Night Sky Brightness
Lake St. Louis, MO's night sky, measured from orbit
Satellite radiance puts Lake St. Louis in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. That's brighter than 79.9% of the 3,206 US 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 Lake St. Louis is from a meaningfully darker sky
3 miles from Lake St. Louis, straight-line, sits O'Fallon, MO, the nearest city here with a darker sky than Lake St. Louis's own suburban band.
O'Fallon, MO is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Lake St. Louis compares nationally
Lake St. Louis, MO counts roughly 19,160 residents, among the 3,206 US cities this site tracks. Lake St. Louis's position, 2,546 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.