Johnstone Rainfall ForecastUnited KingdomSTRenfrewshireJohnstoneToday 3 Sep90%Thu 4 Sep55%Fri 5 Sep10%Sat 6 Sep35%Sun 7 Sep55%Mon 8 Sep35%Tue 9 Sep60%Johnstone rainfall forecast issued today at 7:38 pm. Next forecast at approx. 9:38 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