Romeoville, IL Night Sky Brightness
How dark is the sky in Romeoville, IL?
Romeoville reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. That's brighter than 90.8% of the 3,206 US cities in this dataset.
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.
Where to go for a darker sky near Romeoville
The closest place in this dataset with a meaningfully darker sky is Crest Hill, IL, roughly 4 miles away in a straight line, rated suburban edge. Road distance will be more.
Crest Hill, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Romeoville against the rest of the dataset
Romeoville, IL counts roughly 41,177 residents, among the 3,206 US cities this site tracks. Ranked against the other 3,206 cities here by the methodology guide's own sampling, Romeoville comes in at 2,894, darkest to brightest.