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 11:18 am. Next forecast at approx. 11:18 am.Get WillyWeather+ to remove ads