As of 10:34 AM AST on April 5, 2026, all 3 cities in San Sebastián Municipio, PR in our database have a UV Index reading of High. The city with the highest UV Index reading right now is San Sebastián, PR with a reading of 7.3.
Over the next 24 hours, the highest UV Index reading in San Sebastián Municipio, PR is expected to be 11.7 in San Sebastián between 12:00 PM - 1:00 PM AST today.