Merthyr Tydfil Rainfall ForecastUnited KingdomWLMerthyr TydfilMerthyr TydfilToday 21 Feb100%Sun 22 Feb45%Mon 23 Feb95%Tue 24 Feb25%Wed 25 Feb55%Thu 26 Feb85%Fri 27 Feb55%Merthyr Tydfil rainfall forecast issued today at 6:35 pm. Next forecast at approx. 8:35 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