As of 11:33 AM AST on July 4, 2026, all 3 cities in Guayanilla Municipio, PR in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Guayanilla, PR with a reading of 9.8.
Over the next 24 hours, the highest UV Index reading in Guayanilla Municipio, PR is expected to be 10.6 in Guayanilla between 1:00 PM - 2:00 PM AST today.