Saint Johns River - Plummers Cove UV IndexUnited StatesFLDuval CountySaint Johns River - Plummers Cove1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASaint Johns River - Plummers Cove UV forecast issued today at 3:18 pm. Next forecast at approx. 3:18 pm. UV IndexGet WillyWeather+ to remove ads