Longmont, CO Night Sky Brightness
Longmont, CO's night sky, measured from orbit
Satellite radiance puts Longmont in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 81.1% of the 3,206 cities measured here read darker than Longmont.
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 Longmont
The closest place in this dataset with a meaningfully darker sky is Frederick, CO, roughly 8 miles away in a straight line, rated rural. Road distance will be more.
Frederick, CO is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Longmont compares nationally
Longmont, CO has a population of about 99,818, one of 3,206 US cities of 10,000 or more residents in this dataset. Longmont's position, 2,585 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.