Trefechan Rainfall ForecastUnited KingdomWLMerthyr TydfilTrefechanToday 14 Mar80%Sun 15 Mar85%Mon 16 Mar90%Tue 17 Mar45%Wed 18 MarNo RainThu 19 MarNo RainFri 20 Mar5%Trefechan rainfall forecast issued today at 6:36 am. Next forecast at approx. 8:36 pm.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