Gurnos Rainfall ForecastUnited KingdomWLMerthyr TydfilGurnosToday 18 Dec100%Fri 19 Dec80%Sat 20 Dec80%Sun 21 Dec55%Mon 22 Dec20%Tue 23 Dec15%Wed 24 Dec10%Gurnos rainfall forecast issued today at 12:39 pm. Next forecast at approx. 2:39 am.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