Johnstone Rainfall ForecastUnited KingdomSTRenfrewshireJohnstoneToday 4 Oct85%Mon 5 Oct85%Tue 6 Oct55%Wed 7 Oct35%Thu 8 Oct85%Fri 9 Oct85%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