Trefechan Rainfall ForecastUnited KingdomWLMerthyr TydfilTrefechanToday 29 Nov55%Sun 30 Nov100%Mon 1 Dec100%Tue 2 Dec30%Wed 3 Dec85%Thu 4 Dec80%Fri 5 Dec70%Trefechan rainfall forecast issued today at 6:35 am. Next forecast at approx. 8:35 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