Treharris Rainfall ForecastUnited KingdomWLMerthyr TydfilTreharrisToday 2 May75%Fri 3 May55%Sat 4 May15%Sun 5 May50%Mon 6 May40%Tue 7 May15%Treharris rainfall forecast issued today at 1:38 am. Next forecast at approx. 3:38 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 an account to remove ads