As of 3:08 AM AST on August 1, 2026, all 2 cities in San Juan 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 Juan Municipio, PR is expected to be 11 in San Juan between 1:00 PM - 2:00 PM AST today.