Hilton Head Island, SC Night Sky Brightness
How dark is the sky in Hilton Head Island, SC?
Hilton Head Island'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. Only 4% of the 3,206 cities measured here read darker than Hilton Head Island.
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.
The nearest darker sky to Hilton Head Island
The closest place in this dataset with a meaningfully darker sky is Bluffton, SC, roughly 11 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.
Hilton Head Island against the rest of the dataset
Hilton Head Island, SC has a population of about 38,158, 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, Hilton Head Island comes in at 130, darkest to brightest.