Pen-y-bryn Rainfall ForecastUnited KingdomWLGwyneddPen-y-brynToday 8 Sep90%Wed 9 Sep40%Thu 10 Sep90%Fri 11 Sep5%Sat 12 Sep90%Sun 13 Sep50%Mon 14 Sep80%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Pen-y-bryn rainfall forecast issued today at 7:10 pm. Next forecast at approx. 9:10 am. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads