Johnston Rainfall ForecastUnited KingdomWLPembrokeshireJohnstonToday 29 Mar95%Mon 30 Mar20%Tue 31 Mar20%Wed 1 Apr20%Thu 2 Apr40%Fri 3 Apr35%Johnston rainfall forecast issued today at 12:37 am. Next forecast at approx. 3:37 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Crug-y-Gorllwyn (Carmarthenshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads