Napa, CA's night sky, measured from orbit

Satellite radiance puts Napa 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. That's brighter than 33.9% of the 3,206 US cities in this dataset.

Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things.

How far Napa is from a meaningfully darker sky

The closest place in this dataset with a meaningfully darker sky is Benicia, CA, roughly 17 miles away in a straight line, rated rural. Road distance will be more.

Benicia, 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 Napa compares nationally

Napa, CA has a population of about 76,921, one of 3,206 US cities of 10,000 or more residents in this dataset. Napa places 1,081 of 3,206 cities in this dataset's darkest-to-brightest order.