San Fernando, CA Night Sky Brightness
San Fernando, CA's night sky, measured from orbit
Satellite radiance puts San Fernando in the urban band. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Only 90.6% of the 3,206 cities measured here read darker than San Fernando.
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 San Fernando is from a meaningfully darker sky
13 miles from San Fernando, straight-line, sits Glendale, CA, the nearest city here with a darker sky than San Fernando's own urban band.
Glendale, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How San Fernando compares nationally
About 23,488 people live in San Fernando, CA, sized enough to appear in this dataset of 3,206 incorporated US cities. San Fernando's position, 2,889 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.