As of 9:27 AM AST on August 2, 2026, all 5 cities in Río Grande Municipio, PR in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Río Grande, PR with a reading of 4.3.
Over the next 24 hours, the highest UV Index reading in Río Grande Municipio, PR is expected to be 10.2 in La Dolores between 12:00 PM - 1:00 PM AST today.