Pen-y-Darren Rainfall ForecastUnited KingdomWLMerthyr TydfilPen-y-DarrenToday 24 Nov95%Mon 25 Nov45%Tue 26 Nov75%Wed 27 Nov45%Thu 28 Nov30%Fri 29 Nov60%Sat 30 Nov50%Pen-y-Darren rainfall forecast issued today at 6:38 pm. Next forecast at approx. 8:38 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 WillyWeather+ to remove ads