Harnham Hill Rainfall ForecastUnited KingdomSWWiltshireHarnham HillToday 18 Dec95%Thu 19 Dec5%Fri 20 Dec40%Sat 21 Dec35%Sun 22 Dec15%Mon 23 Dec10%Harnham Hill rainfall forecast issued today at 12:37 am. Next forecast at approx. 2:37 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