Hermon Rainfall ForecastUnited KingdomWLCarmarthenshireHermonToday 19 May95%Wed 20 May90%Thu 21 May45%Fri 22 May10%Sat 23 May25%Sun 24 May5%Mon 25 May5%Hermon rainfall forecast issued today at 7:38 am. Next forecast at approx. 9:38 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