Harnham Hill Rainfall ForecastUnited KingdomSWWiltshireHarnham HillToday 14 Jan65%Thu 15 Jan95%Fri 16 Jan45%Sat 17 Jan15%Sun 18 Jan20%Mon 19 Jan20%Harnham Hill rainfall forecast issued today at 12:36 am. Next forecast at approx. 2:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Dean Hill (Wiltshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads