Merthyr Tydfil Rainfall ForecastUnited KingdomWLMerthyr TydfilMerthyr TydfilToday 2 AprNo RainThu 3 Apr50%Fri 4 Apr10%Sat 5 AprNo RainSun 6 AprNo RainMon 7 AprNo RainMerthyr Tydfil rainfall forecast issued yesterday at 7:39 pm. Next forecast at approx. 9:39 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Crug-y-Gorllwyn (Carmarthenshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads