Trefechan Rainfall ForecastUnited KingdomWLMerthyr TydfilTrefechanToday 2 May85%Fri 3 May25%Sat 4 May35%Sun 5 May40%Mon 6 May30%Tue 7 May15%Trefechan rainfall forecast issued yesterday at 7:38 pm. Next forecast at approx. 9:38 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 an account to remove ads