What the night sky looks like over South San Francisco, CA

South San Francisco reads as suburban on this dataset's scale. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. That's brighter than 57.3% of the 3,206 US cities in this dataset.

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 South San Francisco is from a meaningfully darker sky

San Bruno, CA, about 4 miles away as the crow flies, measures in the suburban edge band, one step darker than South San Francisco. Actual driving distance will run longer than that straight-line figure.

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

South San Francisco against the rest of the dataset

South San Francisco, CA counts roughly 64,660 residents, among the 3,206 US cities this site tracks. Among all 3,206 cities here, South San Francisco ranks 1,828 from darkest to brightest, 1 being the darkest measured.