Markham, IL: how dark is the sky here?

Satellite radiance puts Markham in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 79.7% of the 3,206 cities measured here read darker than Markham.

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.

The nearest darker sky to Markham

Park Forest, IL, about 8 miles away as the crow flies, measures in the suburban edge band, one step darker than Markham. Actual driving distance will run longer than that straight-line figure.

Park Forest, 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 Markham compares nationally

About 11,290 people live in Markham, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Markham places 2,543 of 3,206 cities in this dataset's darkest-to-brightest order.