Mc Kenna Airport Rainfall ForecastUnited StatesMTGallatin CountyMc Kenna AirportToday 19 Apr10%Sun 20 Apr75%Mon 21 Apr90%Tue 22 Apr30%Wed 23 Apr35%Thu 24 Apr35%Fri 25 Apr35%Mc Kenna Airport rainfall forecast issued today at 4:04 am. Next forecast at approx. 6:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Great Falls RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads