St Austell Rainfall ForecastUnited KingdomSWCornwallSt AustellToday 14 Jul15%Tue 15 Jul80%Wed 16 Jul90%Thu 17 Jul40%Fri 18 Jul40%Sat 19 Jul35%Sun 20 Jul35%St Austell rainfall forecast issued today at 7:36 pm. Next forecast at approx. 9:36 am.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