As of 12:57 AM AST on October 18, 2025, all 2 cities in Cayey 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 Cayey Municipio, PR is expected to be 9.8 in Cayey between 12:00 PM - 1:00 PM AST today.