As of 2:02 PM AST on May 13, 2026, all 5 cities in Río Grande Municipio, PR in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Río Grande, PR with a reading of 10.3.
Over the next 24 hours, the highest UV Index reading in Río Grande Municipio, PR is expected to be 12.7 in Río Grande between 12:00 PM - 1:00 PM AST tomorrow.