Johnstone Rainfall ForecastUnited KingdomSTRenfrewshireJohnstoneToday 16 Sep95%Thu 17 Sep75%Fri 18 Sep85%Sat 19 Sep35%Sun 20 Sep45%Mon 21 Sep45%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