Freeport, IL Night Sky Brightness
Freeport, IL's night sky, measured from orbit
Freeport reads as suburban edge on this dataset's scale. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Only 39.4% of the 3,206 cities measured here read darker than Freeport.
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.
Where to go for a darker sky near Freeport
38 miles from Freeport, straight-line, sits Belvidere, IL, the nearest city here with a darker sky than Freeport's own suburban edge band.
Belvidere, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Freeport compares nationally
Freeport, IL has a population of about 23,140, one of 3,206 US cities of 10,000 or more residents in this dataset. Freeport's position, 1,256 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.