Penwhapple Reservoir Rainfall ForecastUnited KingdomSTSouth AyrshirePenwhapple ReservoirToday 18 May70%Tue 19 May80%Wed 20 May55%Thu 21 May55%Fri 22 May15%Sat 23 May15%Penwhapple Reservoir rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 pm.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