What the night sky looks like over San Dimas, CA

Satellite radiance puts San Dimas in the urban band. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Only 86.8% of the 3,206 cities measured here read darker than San Dimas.

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.

How far San Dimas is from a meaningfully darker sky

2 miles from San Dimas, straight-line, sits La Verne, CA, the nearest city here with a darker sky than San Dimas's own urban band.

La Verne, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

San Dimas against the rest of the dataset

San Dimas, CA counts roughly 33,226 residents, among the 3,206 US cities this site tracks. Among all 3,206 cities here, San Dimas ranks 2,768 from darkest to brightest, 1 being the darkest measured.