Grangeston Rainfall ForecastUnited KingdomSTSouth AyrshireGrangestonToday 17 Aug5%Mon 18 Aug15%Tue 19 Aug10%Wed 20 AugNo RainThu 21 AugNo RainFri 22 Aug5%Sat 23 Aug10%Grangeston rainfall forecast issued today at 1:38 pm. Next forecast at approx. 3:38 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Holehead (Stirling) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads