Morton, IL: how dark is the sky here?
Morton reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Only 88.4% of the 3,206 cities measured here read darker than Morton.
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 Morton
East Peoria, IL, about 6 miles away as the crow flies, measures in the suburban band, one step darker than Morton. Actual driving distance will run longer than that straight-line figure.
East Peoria, 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 Morton compares nationally
Morton, IL has a population of about 17,557, one of 3,206 US cities of 10,000 or more residents in this dataset. Morton places 2,818 of 3,206 cities in this dataset's darkest-to-brightest order.