What the night sky looks like over Hudson, WI
Hudson's sky measures urban here. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Hudson's sky is brighter than 96.5% of the 3,206 cities in this dataset.
The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class.
How far Hudson is from a meaningfully darker sky
The closest place in this dataset with a meaningfully darker sky is Stillwater, MN, roughly 8 miles away in a straight line, rated rural. Road distance will be more.
Stillwater, MN is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Hudson against the rest of the dataset
Hudson, WI has a population of about 15,031, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Hudson ranks 3,076 from darkest to brightest, 1 being the darkest measured.