St Harmon Wind ForecastUnited KingdomWLPowysSt Harmon1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time St Harmon wind forecast issued today at 6:09 pm. Next forecast at approx. 6:09 am.St Harmon Wind Statistics December WindTrawsgoed (31km)2025NovemberDecemberStrongest 5 December, 202522.4mph SEAverage December6.7mphStrongest 14 November, 202526.8mph EAverage November4.7mphStrongest 5 January, 202526.8mph EAverage 20254.3mphClimate (2011–Present)Trawsgoed (31km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202435.8mph NWAverage 2020–20254.3mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average December17.5%10%2.5%CalmStrongDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December20%11.25%2.5%CalmStrongGet WillyWeather+ to remove ads