Alton Wind ForecastUnited StatesIASioux CountyAlton1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Alton wind forecast issued today at 3:32 am. Next forecast at approx. 3:32 pm.Alton Wind Statistics April WindLe Mars Municipal Airport (16.8 miles)2025MarchAprilStrongest – Average April–Strongest 19 March, 202536.9mph NAverage March12.8mphStrongest 19 March, 202536.9mph NAverage 202511.3mphClimate (2010–Present)Le Mars Municipal Airport (16.8 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 23 April, 202242.5mph SSWAverage 2020–202510.3mphGet WillyWeather+ to remove ads