Heolgerrig Rainfall ForecastUnited KingdomWLMerthyr TydfilHeolgerrigToday 5 Apr40%Mon 6 Apr5%Tue 7 Apr5%Wed 8 Apr40%Thu 9 Apr40%Fri 10 Apr10%Sat 11 Apr10%Heolgerrig rainfall forecast issued today at 7:37 am. Next forecast at approx. 9:37 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