As of 5:28 PM AST on May 16, 2026, all 1 cities in Guaynabo Municipio, PR in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Guaynabo, PR with a reading of 1.4.
Over the next 24 hours, the highest UV Index reading in Guaynabo Municipio, PR is expected to be 11.9 in Guaynabo between 12:00 PM - 1:00 PM AST tomorrow.