Merthyr Tydfil Rainfall ForecastUnited KingdomWLMerthyr TydfilMerthyr TydfilToday 25 Sep15%Sat 26 Sep10%Sun 27 Sep85%Mon 28 Sep15%Tue 29 Sep85%Wed 30 Sep45%Thu 1 Oct40%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Merthyr Tydfil rainfall forecast issued today at 7:11 am. Next forecast at approx. 9:11 pm. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads