Merthyr Mawr Rainfall ForecastUnited KingdomWLBridgendMerthyr MawrToday 4 Dec95%Thu 5 Dec70%Fri 6 Dec85%Sat 7 Dec45%Sun 8 Dec5%Mon 9 Dec10%Merthyr Mawr rainfall forecast issued today at 6:38 am. Next forecast at approx. 8:38 pm.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