Corona, CA: how dark is the sky here?

Satellite radiance puts Corona in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 63.9% of the 3,206 cities measured here read darker than Corona.

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.

How far Corona is from a meaningfully darker sky

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

Norco, 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 Corona compares nationally

About 161,540 people live in Corona, CA, sized enough to appear in this dataset of 3,206 incorporated US cities. Corona places 2,039 of 3,206 cities in this dataset's darkest-to-brightest order.