Sheep Slough - Quimby Island UV IndexUnited StatesCAContra Costa CountySheep Slough - Quimby Island1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASheep Slough - Quimby Island UV forecast issued today at 12:17 pm. Next forecast at approx. 12:17 pm.Get WillyWeather+ to remove ads