Treharris Rainfall ForecastUnited KingdomWLMerthyr TydfilTreharrisToday 3 Apr60%Sat 4 Apr95%Sun 5 Apr40%Mon 6 Apr5%Tue 7 Apr45%Wed 8 Apr45%Thu 9 Apr20%Treharris rainfall forecast issued today at 7:37 am. Next forecast at approx. 9:37 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