Garrison Wind ForecastUnited StatesMTPowell CountyGarrison1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Garrison wind forecast issued today at 10:31 pm. Next forecast at approx. 10:31 am.Garrison Wind Statistics May WindHelena Regional Airport (39.8 miles)2025AprilMayStrongest – Average May–Strongest 12 April, 202552.1mph WAverage April8.1mphStrongest 12 April, 202552.1mph WAverage 20256.5mphClimate (2010–Present)Helena Regional Airport (39.8 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 December, 202466mph WAverage 2020–20257.3mphGet WillyWeather+ to remove ads