Heolgerrig Rainfall ForecastUnited KingdomWLMerthyr TydfilHeolgerrigToday 18 Sep75%Fri 19 Sep80%Sat 20 Sep90%Sun 21 Sep15%Mon 22 Sep5%Tue 23 Sep5%Wed 24 Sep5%Heolgerrig rainfall forecast issued today at 7:38 pm. Next forecast at approx. 9:38 am.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