Mokelumne River - South Mokelumne River Entrance UV IndexUnited StatesCASan Joaquin CountyMokelumne River - South Mokelumne River Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAMokelumne River - South Mokelumne River Entrance UV forecast issued yesterday at 11:17 am. Next forecast at approx. 11:17 am.Get WillyWeather+ to remove ads