Johnston Rainfall ForecastUnited KingdomWLPembrokeshireJohnstonToday 13 Jul25%Mon 14 Jul60%Tue 15 Jul35%Wed 16 Jul50%Thu 17 Jul20%Fri 18 Jul30%Johnston rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 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