San Gabriel, CA Night Sky Brightness
What the night sky looks like over San Gabriel, CA
Satellite radiance puts San Gabriel in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 75.1% of the 3,206 cities measured here read darker than San Gabriel.
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.
How far San Gabriel is from a meaningfully darker sky
San Marino, CA, about 2 miles away as the crow flies, measures in the suburban edge band, one step darker than San Gabriel. Actual driving distance will run longer than that straight-line figure.
San Marino, 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 Gabriel against the rest of the dataset
San Gabriel, CA has a population of about 37,926, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, San Gabriel ranks 2,396 from darkest to brightest, 1 being the darkest measured, by the sampling the methodology guide documents.