Llanystumdwy Rainfall ForecastUnited KingdomWLGwyneddLlanystumdwyToday 16 Jan10%Sat 17 Jan5%Sun 18 Jan10%Mon 19 Jan30%Tue 20 Jan15%Wed 21 Jan45%Llanystumdwy rainfall forecast issued today at 6:36 am. Next forecast at approx. 8:36 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