As of 11:26 PM AST on October 1, 2026, 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 10.5 in Río Grande between 1:00 PM - 2:00 PM AST tomorrow.