Old St Mellons Rainfall ForecastUnited KingdomWLCardiffOld St MellonsToday 7 Sep90%Tue 8 Sep45%Wed 9 Sep10%Thu 10 Sep45%Fri 11 Sep10%Sat 12 Sep20%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Old St Mellons rainfall forecast issued today at 1:08 am. Next forecast at approx. 3:08 pm. Rainfall Rainfall AccumulationCobbacombe Cross (Devon) RadarGet WillyWeather+ to remove ads