Trefechan Rainfall ForecastUnited KingdomWLMerthyr TydfilTrefechanToday 29 Jan100%Fri 30 Jan95%Sat 31 Jan50%Sun 1 Feb40%Mon 2 Feb80%Tue 3 Feb50%Wed 4 Feb25%Trefechan rainfall forecast issued today at 12:40 pm. Next forecast at approx. 2:40 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