Windsor, WI: how dark is the sky here?

Windsor reads as dark sky on this dataset's scale. Among the darkest skies of any US city in this dataset. The Milky Way should be visible overhead on clear, moonless nights. Windsor's sky is brighter than 1.2% of the 3,206 cities in this dataset.

This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.

Windsor is already about as dark as this dataset gets

Nothing in this dataset's 3,206 US cities measures a darker sky than Windsor. That doesn't mean nowhere is darker, unincorporated land and wilderness aren't part of this dataset at all, only incorporated cities of 10,000 people or more.

How Windsor compares nationally

Windsor, WI has a population of about 10,005, one of 3,206 US cities of 10,000 or more residents in this dataset. Windsor places 40 of 3,206 cities in this dataset's darkest-to-brightest order.