What the night sky looks like over Mexico, MO
Mexico's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. Mexico's sky is brighter than 10.4% of the 3,206 cities in this dataset.
The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class.
How far Mexico is from a meaningfully darker sky
The closest place in this dataset with a meaningfully darker sky is Godfrey, IL, roughly 90 miles away in a straight line, rated dark sky. Road distance will be more.
Godfrey, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Mexico against the rest of the dataset
About 11,482 people live in Mexico, MO, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, Mexico ranks 331 from darkest to brightest, 1 being the darkest measured.