Johnstone Rainfall ForecastUnited KingdomSTRenfrewshireJohnstoneToday 31 Jul80%Sat 1 Aug55%Sun 2 Aug10%Mon 3 Aug55%Tue 4 Aug65%Wed 5 Aug45%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Johnstone rainfall forecast issued today at 1:08 am. Next forecast at approx. 3:08 pm. Rainfall Rainfall AccumulationHolehead (Stirling) RadarGet WillyWeather+ to remove ads