Altnagelvin Rainfall ForecastUnited KingdomNIDerryAltnagelvinToday 1 Apr50%Thu 2 Apr90%Fri 3 Apr55%Sat 4 Apr90%Sun 5 Apr45%Mon 6 Apr55%Tue 7 Apr65%Altnagelvin rainfall forecast issued today at 7:38 pm. Next forecast at approx. 9:38 am.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