San Joaquin River - Gallagher Slough UV IndexUnited StatesCASacramento CountySan Joaquin River - Gallagher Slough1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASan Joaquin River - Gallagher Slough UV forecast issued yesterday at 11:17 am. Next forecast at approx. 11:17 am.Get WillyWeather+ to remove ads