LLwyn-on Rainfall ForecastUnited KingdomWLMerthyr TydfilLLwyn-onToday 17 Apr100%Sat 18 Apr15%Sun 19 Apr5%Mon 20 Apr20%Tue 21 Apr20%Wed 22 Apr5%Thu 23 Apr5%LLwyn-on rainfall forecast issued today at 7:36 am. Next forecast at approx. 9:36 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