Washington Rainfall ForecastUnited KingdomSEWest SussexWashingtonToday 15 Dec15%Tue 16 Dec15%Wed 17 Dec90%Thu 18 Dec90%Fri 19 Dec35%Sat 20 Dec65%Sun 21 Dec15%Washington rainfall forecast issued today at 6:37 pm. Next forecast at approx. 8:37 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Thurnham (Kent) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads