St Winnow Rainfall ForecastUnited KingdomSWCornwallSt WinnowToday 18 Sep15%Fri 19 Sep75%Sat 20 Sep85%Sun 21 Sep45%Mon 22 Sep5%Tue 23 Sep10%Wed 24 Sep5%St Winnow rainfall forecast issued today at 7:36 am. Next forecast at approx. 9:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Predannack (Cornwall) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads