Johnstone Rainfall ForecastUnited KingdomSTRenfrewshireJohnstoneToday 6 Jan70%Wed 7 Jan60%Thu 8 Jan25%Fri 9 Jan45%Sat 10 Jan45%Sun 11 Jan55%Mon 12 Jan50%Johnstone rainfall forecast issued today at 6:37 pm. Next forecast at approx. 8:37 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