Ammon, ID Night Sky Brightness
How dark is the sky in Ammon, ID?
Ammon 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 14.5% of the 3,206 cities measured here read darker than Ammon.
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.
How far Ammon is from a meaningfully darker sky
The closest place in this dataset with a meaningfully darker sky is Smithfield, UT, roughly 113 miles away in a straight line, rated rural. Road distance will be more.
Smithfield, UT is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Ammon against the rest of the dataset
Ammon, ID has a population of about 20,095, 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, Ammon comes in at 462, darkest to brightest.