Onllwyn Rainfall ForecastUnited KingdomWLNeath Port TalbotOnllwynToday 12 Sep95%Sun 13 Sep95%Mon 14 Sep90%Tue 15 Sep90%Wed 16 Sep90%Thu 17 Sep60%Fri 18 Sep80%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Onllwyn rainfall forecast issued today at 7:08 pm. Next forecast at approx. 9:08 am. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads