Harrow Weald Rainfall ForecastUnited KingdomSEGreater LondonHarrow WealdToday 15 May80%Sat 16 May80%Sun 17 May55%Mon 18 May60%Tue 19 May85%Wed 20 May10%Thu 21 May5%Harrow Weald rainfall forecast issued today at 7:39 am. Next forecast at approx. 9:39 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Chenies (Hertfordshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads