Trefechan Rainfall ForecastUnited KingdomWLMerthyr TydfilTrefechanToday 10 Sep95%Fri 11 Sep10%Sat 12 Sep90%Sun 13 Sep40%Mon 14 Sep60%Tue 15 Sep50%Wed 16 Sep40%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Trefechan rainfall forecast issued today at 7:09 am. Next forecast at approx. 9:09 pm. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads