Johnston Wind ForecastUnited StatesSCEdgefield CountyJohnston1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Johnston wind forecast issued today at 8:38 pm. Next forecast at approx. 8:38 am.Johnston Wind Statistics May WindAiken Municipal Airport (14.3 miles)2026AprilMayStrongest – Average May–Strongest 8 April, 202616.1mph ENEAverage April7.6mphStrongest 10 January, 202621.9mph SWAverage 20267.7mphClimate (2010–Present)Aiken Municipal Airport (14.3 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 12 March, 202227.7mph WAverage 2021–20267.4mphGet WillyWeather+ to remove ads