St Mary Hill Wind ForecastUnited KingdomWLVale of GlamorganSt Mary Hill1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time St Mary Hill wind forecast issued today at 12:09 am. Next forecast at approx. 12:09 pm.St Mary Hill Wind Statistics December WindSt-athan (10km)2025NovemberDecemberStrongest 5 December, 202529.1mph SSEAverage December10.4mphStrongest 24 November, 202524.6mph WAverage November8.4mphStrongest 16 April, 202535.8mph WAverage 20257.9mphClimate (2011–Present)St-athan (10km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202447mph WAverage 2020–20257.7mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average December27.5%15%2.5%CalmNear GaleDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December20%11.25%2.5%CalmNear GaleGet WillyWeather+ to remove ads