Lemont, IL Night Sky Brightness
Lemont, IL's night sky, measured from orbit
Satellite radiance puts Lemont in the suburban edge band. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Lemont's sky is brighter than 37.6% 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 Lemont is from a meaningfully darker sky
The closest place in this dataset with a meaningfully darker sky is Bartlett, IL, roughly 23 miles away in a straight line, rated rural. Road distance will be more.
Bartlett, 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 Lemont compares nationally
Lemont, IL has a population of about 18,203, one of 3,206 US cities of 10,000 or more residents in this dataset. Lemont's position, 1,199 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.