Heolgerrig Rainfall ForecastUnited KingdomWLMerthyr TydfilHeolgerrigToday 1 Sep95%Tue 2 Sep95%Wed 3 Sep90%Thu 4 Sep45%Fri 5 Sep20%Sat 6 Sep40%Sun 7 Sep55%Heolgerrig rainfall forecast issued today at 1:36 pm. Next forecast at approx. 3:36 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