As of 5:23 AM AST on May 5, 2026, all 3 cities in Guayanilla 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 Guayanilla Municipio, PR is expected to be 12.7 in Guayanilla between 1:00 PM - 2:00 PM AST today.