San Leandro, CA Night Sky Brightness
San Leandro, CA's night sky, measured from orbit
Satellite radiance puts San Leandro in the urban band. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Only 96.5% of the 3,206 cities measured here read darker than San Leandro.
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 Leandro is from a meaningfully darker sky
Alameda, CA, about 6 miles away as the crow flies, measures in the rural band, one step darker than San Leandro. Actual driving distance will run longer than that straight-line figure.
Alameda, 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 Leandro compares nationally
San Leandro, CA has a population of about 86,571, one of 3,206 US cities of 10,000 or more residents in this dataset. San Leandro's position, 3,077 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.