What the night sky looks like over Miami, FL
Miami's sky measures inner-city here. Among the brightest skies in this dataset. Usually just the Moon and a few of the brightest stars or planets cut through. That's brighter than 99.7% of the 3,206 US 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 Miami is from a meaningfully darker sky
Miami Beach, FL, about 4 miles away as the crow flies, measures in the suburban edge band, one step darker than Miami. Actual driving distance will run longer than that straight-line figure.
Miami Beach, FL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Miami against the rest of the dataset
Miami, FL has a population of about 487,014, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Miami ranks 3,179 from darkest to brightest, 1 being the darkest measured.