DarkSkyCheck

Onalaska, WI: how dark is the sky here?

Satellite radiance puts Onalaska in the rural band. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. Only 5.8% of the 3,206 cities measured here read darker than Onalaska.

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.

How far Onalaska is from a meaningfully darker sky

84 miles from Onalaska, straight-line, sits Red Wing, MN, the nearest city here with a darker sky than Onalaska's own rural band.

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

How Onalaska compares nationally

Onalaska, WI counts roughly 19,898 residents, among the 3,206 US cities this site tracks. Onalaska places 186 of 3,206 cities in this dataset's darkest-to-brightest order.