Pen-y-Darren Rainfall ForecastUnited KingdomWLMerthyr TydfilPen-y-DarrenToday 5 Nov55%Fri 6 Nov20%Sat 7 Nov20%Sun 8 Nov20%Mon 9 Nov50%Tue 10 Nov50%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Pen-y-Darren rainfall forecast issued today at 6:11 am. Next forecast at approx. 8:11 pm. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads