Onchan Rainfall ForecastUnited KingdomDGDumfries and GallowayOnchanToday 18 Dec55%Thu 19 Dec65%Fri 20 Dec80%Sat 21 Dec45%Sun 22 Dec60%Mon 23 Dec45%Onchan 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 Castor Bay (Lurgan) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads