Clayton, CA: how dark is the sky here?

Clayton's sky measures suburban edge here. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Clayton's sky is brighter than 19.8% of the 3,206 cities in this dataset.

This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.

The nearest darker sky to Clayton

9 miles from Clayton, straight-line, sits Danville, CA, the nearest city here with a darker sky than Clayton's own suburban edge band.

Danville, 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 Clayton compares nationally

About 10,933 people live in Clayton, CA, sized enough to appear in this dataset of 3,206 incorporated US cities. Clayton places 631 of 3,206 cities in this dataset's darkest-to-brightest order.