St Winnow Rainfall ForecastUnited KingdomSWCornwallSt WinnowToday 18 May95%Tue 19 May85%Wed 20 May20%Thu 21 May15%Fri 22 May15%Sat 23 May10%St Winnow rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 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