As of 5:31 PM AST on July 29, 2025, all 281 cities in Puerto Rico in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Isabela, PR with a reading of 1.6.
Over the next 24 hours, the highest UV Index reading in Puerto Rico is expected to be 12.4 in Guayama between 12:00 PM - 1:00 PM AST tomorrow.