Fort Pierce, FL: how dark is the sky here?
Satellite radiance puts Fort Pierce in the suburban band. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. That's brighter than 69.7% 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.
The nearest darker sky to Fort Pierce
Port St. Lucie, FL, about 10 miles away as the crow flies, measures in the suburban edge band, one step darker than Fort Pierce. Actual driving distance will run longer than that straight-line figure.
Port St. Lucie, FL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Fort Pierce compares nationally
About 50,805 people live in Fort Pierce, FL, sized enough to appear in this dataset of 3,206 incorporated US cities. Fort Pierce places 2,223 of 3,206 cities in this dataset's darkest-to-brightest order.