St Mellons Rainfall ForecastUnited KingdomWLCardiffSt MellonsToday 6 Nov50%Fri 7 Nov85%Sat 8 Nov5%Sun 9 Nov85%Mon 10 Nov65%Tue 11 Nov55%Wed 12 Nov40%St Mellons rainfall forecast issued today at 6:36 pm. Next forecast at approx. 8:36 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Cobbacombe Cross (Devon) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads