Altnagelvin Rainfall ForecastUnited KingdomNIDerryAltnagelvinToday 16 Aug85%Mon 17 Aug90%Tue 18 Aug40%Wed 19 Aug40%Thu 20 Aug35%Fri 21 Aug30%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Altnagelvin rainfall forecast issued today at 1:08 am. Next forecast at approx. 3:08 pm. Rainfall Rainfall AccumulationCastor Bay (Lurgan) RadarGet WillyWeather+ to remove ads