How dark is the sky in Healdsburg, CA?

Healdsburg reads as suburban edge on this dataset's scale. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Healdsburg's sky is brighter than 22.6% 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 Healdsburg

The closest place in this dataset with a meaningfully darker sky is San Anselmo, CA, roughly 47 miles away in a straight line, rated rural. Road distance will be more.

San Anselmo, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

Healdsburg against the rest of the dataset

Healdsburg, CA counts roughly 11,231 residents, among the 3,206 US cities this site tracks. Among all 3,206 cities here, Healdsburg ranks 724 from darkest to brightest, 1 being the darkest measured.