Hartley Wind ForecastUnited StatesIAOBrien CountyHartley1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Hartley wind forecast issued yesterday at 11:33 pm. Next forecast at approx. 11:33 am.Hartley Wind Statistics July WindSpencer Municipal Airport (13 miles)2025JuneJulyStrongest – Average July–Strongest 11 June, 202549mph NAverage June9.8mphStrongest 28 February, 202562mph NWAverage 202512.1mphClimate (2010–Present)Spencer Municipal Airport (13 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 21 June, 202474.9mph NNEAverage 2020–202511mphGet WillyWeather+ to remove ads