As of 8:38 AM AST on April 3, 2026, all 5 cities in Río Grande Municipio, PR in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Río Grande, PR with a reading of 1.4.
Over the next 24 hours, the highest UV Index reading in Río Grande Municipio, PR is expected to be 11.1 in Río Grande between 1:00 PM - 2:00 PM AST today.