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 today at 12:19 pm. Next forecast at approx. 12:19 pm.Get an account to remove ads