Old St Mellons Rainfall ForecastUnited KingdomWLCardiffOld St MellonsToday 21 JulNo RainWed 22 Jul5%Thu 23 Jul5%Fri 24 Jul5%Sat 25 Jul10%Sun 26 Jul10%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 3:05 am. Next forecast at approx. . Rainfall Rainfall AccumulationCobbacombe Cross (Devon) RadarGet WillyWeather+ to remove ads