Rio Vista, CA: how dark is the sky here?

Rio Vista's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. Only 11.5% of the 3,206 cities measured here read darker than Rio Vista.

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 Rio Vista

115 miles from Rio Vista, straight-line, sits Truckee, CA, the nearest city here with a darker sky than Rio Vista's own rural band.

Truckee, 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 Rio Vista compares nationally

Rio Vista, CA has a population of about 10,248, one of 3,206 US cities of 10,000 or more residents in this dataset. Rio Vista places 369 of 3,206 cities in this dataset's darkest-to-brightest order.