Harnham Rainfall ForecastUnited KingdomSWWiltshireHarnhamToday 21 Nov70%Fri 22 Nov90%Sat 23 Nov95%Sun 24 Nov90%Mon 25 Nov10%Tue 26 Nov15%Wed 27 Nov5%Harnham rainfall forecast issued today at 12:40 pm. Next forecast at approx. 2:40 am.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