As of 1:35 AM AST on September 30, 2025, all 5 cities in Río Grande 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 Río Grande Municipio, PR is expected to be 11 in Río Grande between 12:00 PM - 1:00 PM AST today.