As of 7:43 PM AST on July 18, 2025, all 3 cities in San Sebastián Municipio, PR in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in San Sebastián Municipio, PR is expected to be 10.7 in San Sebastián between 12:00 PM - 1:00 PM AST tomorrow.