Treharris Rainfall ForecastUnited KingdomWLMerthyr TydfilTreharrisToday 30 Sep75%Thu 1 Oct60%Fri 2 Oct35%Sat 3 Oct15%Sun 4 Oct15%Mon 5 Oct15%Tue 6 Oct15%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Treharris rainfall forecast issued today at 7:08 am. Next forecast at approx. 9:08 pm. Rainfall Rainfall AccumulationCobbacombe Cross (Devon) RadarGet WillyWeather+ to remove ads