Tonmawr Rainfall ForecastUnited KingdomWLNeath Port TalbotTonmawrToday 18 Dec95%Thu 19 Dec45%Fri 20 Dec90%Sat 21 Dec80%Sun 22 Dec35%Mon 23 Dec25%Tonmawr rainfall forecast issued today at 12:37 am. Next forecast at approx. 2:37 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