Johnstone Rainfall ForecastUnited KingdomSTRenfrewshireJohnstoneToday 5 Jun80%Sat 6 Jun60%Sun 7 Jun65%Mon 8 Jun60%Tue 9 Jun40%Wed 10 Jun50%Johnstone rainfall forecast issued today at 1:35 am. Next forecast at approx. 3:35 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