Signal Hill, CA's night sky, measured from orbit

Signal Hill reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. That's brighter than 93.4% of the 3,206 US cities in this dataset.

Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things.

How far Signal Hill is from a meaningfully darker sky

4 miles from Signal Hill, straight-line, sits Lakewood, CA, the nearest city here with a darker sky than Signal Hill's own urban band.

Lakewood, 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 Signal Hill compares nationally

Signal Hill, CA counts roughly 11,279 residents, among the 3,206 US cities this site tracks. Signal Hill places 2,979 of 3,206 cities in this dataset's darkest-to-brightest order.