Gurnos Rainfall ForecastUnited KingdomWLMerthyr TydfilGurnosToday 18 Sep90%Fri 19 Sep15%Sat 20 Sep85%Sun 21 Sep35%Mon 22 Sep5%Tue 23 Sep5%Wed 24 Sep10%Gurnos rainfall forecast issued today at 7:36 am. Next forecast at approx. 9:36 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