Upper Sydenham Rainfall ForecastUnited KingdomSEGreater LondonUpper SydenhamToday 30 JunNo RainTue 1 Jul5%Wed 2 Jul35%Thu 3 Jul10%Fri 4 Jul10%Sat 5 Jul15%Upper Sydenham 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 Chenies (Hertfordshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads