As of 8:52 PM AST on August 19, 2025, all 1 cities in Guaynabo 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 Guaynabo Municipio, PR is expected to be 10.6 in Guaynabo between 1:00 PM - 2:00 PM AST tomorrow.