Trefechan Wind ForecastUnited KingdomWLMerthyr TydfilTrefechan1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Trefechan wind forecast issued today at 6:09 am. Next forecast at approx. 6:09 pm.Trefechan Wind Statistics December WindSennybridge (35km)2025NovemberDecemberStrongest 1 December, 202520.1mph SSWAverage December17.9mphStrongest 28 November, 202526.8mph SWAverage November6.8mphStrongest 24 January, 202535.8mph SSWAverage 20255.1mphClimate (2011–Present)Sennybridge (35km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 26 December, 202035.8mph SWAverage 2020–20255.3mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average December15%8.75%2.5%CalmGaleDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December20%11.25%2.5%CalmGaleGet WillyWeather+ to remove ads