Gurnos Rainfall ForecastUnited KingdomWLMerthyr TydfilGurnosToday 2 Apr95%Fri 3 Apr85%Sat 4 Apr80%Sun 5 Apr15%Mon 6 Apr40%Tue 7 Apr40%Gurnos rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 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