As of 10:01 AM AST on January 10, 2026, all 2 cities in Cayey Municipio, PR in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Cayey, PR with a reading of 4.
Over the next 24 hours, the highest UV Index reading in Cayey Municipio, PR is expected to be 7.4 in Cayey between 12:00 PM - 1:00 PM AST today.