As of 9:08 AM AST on September 9, 2025, all 3 cities in Guayanilla Municipio, PR in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Guayanilla, PR with a reading of 3.7.
Over the next 24 hours, the highest UV Index reading in Guayanilla Municipio, PR is expected to be 12 in Guayanilla between 12:00 PM - 1:00 PM AST today.