Derrydoon Rainfall ForecastUnited KingdomNIFermanaghDerrydoonToday 16 Aug90%Mon 17 Aug80%Tue 18 Aug35%Wed 19 Aug45%Thu 20 Aug55%Fri 21 Aug10%Sat 22 Aug10%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Derrydoon rainfall forecast issued today at 7:09 am. Next forecast at approx. 9:09 pm. Rainfall Rainfall AccumulationCastor Bay (Lurgan) RadarGet WillyWeather+ to remove ads