Rock Island, IL: how dark is the sky here?

Rock Island's sky measures suburban here. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. That's brighter than 51% of the 3,206 US 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.

How far Rock Island is from a meaningfully darker sky

Moline, IL, about 5 miles away as the crow flies, measures in the suburban edge band, one step darker than Rock Island. Actual driving distance will run longer than that straight-line figure.

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

How Rock Island compares nationally

About 36,434 people live in Rock Island, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Rock Island places 1,626 of 3,206 cities in this dataset's darkest-to-brightest order.