Gilroy, CA Night Sky Brightness
Gilroy, CA's night sky, measured from orbit
Gilroy 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. Gilroy's sky is brighter than 36.6% of the 3,206 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, explained in the Bortle scale guide.
Where to go for a darker sky near Gilroy
29 miles from Gilroy, straight-line, sits Seaside, CA, the nearest city here with a darker sky than Gilroy's own suburban edge band.
Seaside, 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 Gilroy compares nationally
Gilroy, CA counts roughly 60,390 residents, among the 3,206 US cities this site tracks. Gilroy's position, 1,168 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.