Onllwyn Rainfall ForecastUnited KingdomWLNeath Port TalbotOnllwynToday 1 Dec100%Tue 2 Dec70%Wed 3 Dec85%Thu 4 Dec45%Fri 5 Dec85%Sat 6 Dec50%Onllwyn rainfall forecast issued today at 6:35 am. Next forecast at approx. 8:35 pm.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