How dark is the sky in Davis, CA?
Satellite radiance puts Davis in the suburban edge band. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Davis's sky is brighter than 33.8% of the 3,206 cities in this dataset.
Worth remembering: this is satellite radiance, not a ground observation. A true Bortle rating needs a human eye at night, this is the closest large-scale substitute.
The nearest darker sky to Davis
Rio Vista, CA, about 26 miles away as the crow flies, measures in the rural band, one step darker than Davis. Actual driving distance will run longer than that straight-line figure.
Rio Vista, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Davis against the rest of the dataset
Davis, CA has a population of about 67,125, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Davis ranks 1,079 from darkest to brightest, 1 being the darkest measured.