Fontana, CA Night Sky Brightness
What the night sky looks like over Fontana, CA
Fontana reads as suburban on this dataset's scale. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 78% of the 3,206 cities measured here read darker than Fontana.
The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class - the Bortle scale guide covers why.
Where to go for a darker sky near Fontana
11 miles from Fontana, straight-line, sits Upland, CA, the nearest city here with a darker sky than Fontana's own suburban band.
Upland, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Fontana against the rest of the dataset
Fontana, CA has a population of about 218,455, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Fontana ranks 2,487 from darkest to brightest, 1 being the darkest measured, by the sampling the methodology guide documents.