As of 2:23 PM AST on August 22, 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 9.4.
Over the next 24 hours, the highest UV Index reading in Río Grande Municipio, PR is expected to be 11.1 in La Dolores between 12:00 PM - 1:00 PM AST tomorrow.