Sion Mills Wind ForecastUnited KingdomNIStrabaneSion Mills1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Sion Mills wind forecast issued today at 1:09 am. Next forecast at approx. 1:09 pm.Sion Mills Wind Statistics July WindCastlederg (11km)2025JuneJulyStrongest – Average July–Strongest 23 June, 202520.1mph WAverage June5mphStrongest 24 January, 202538mph SWAverage 20255.2mphClimate (2011–Present)Castlederg (11km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 21 January, 202447mph WSWAverage 2020–20255.2mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average July17.5%10%2.5%CalmStrongJuly Wind RoseJuly (5 Year Average)5 Year Average Annual5 Year Average July27.5%15%2.5%CalmStrongGet WillyWeather+ to remove ads