Harrow on the Hill Wind ForecastUnited KingdomSEGreater LondonHarrow on the Hill1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Harrow on the Hill wind forecast issued today at 7:12 am. Next forecast at approx. 7:12 pm.Harrow on the Hill Wind Statistics May WindNortholt (5km)2025AprilMayStrongest 5 May, 202517.9mph NNEAverage May6.4mphStrongest 2 April, 202520.1mph EAverage April6.3mphStrongest 1 January, 202524.6mph SWAverage 20255.6mphClimate (2011–Present)Northolt (5km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202238mph WSWAverage 2020–20256.3mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average May20%11.25%2.5%CalmStrongMay Wind RoseMay (5 Year Average)5 Year Average Annual5 Year Average May15%8.75%2.5%CalmStrongGet WillyWeather+ to remove ads