St Allen Rainfall ForecastUnited KingdomSWCornwallSt AllenToday 19 Jul90%Sun 20 Jul65%Mon 21 Jul35%Tue 22 Jul45%Wed 23 Jul30%Thu 24 Jul10%St Allen rainfall forecast issued yesterday at 7:37 pm. Next forecast at approx. 9:37 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