Ennis - Big Sky Airport Rainfall ForecastUnited StatesMTMadison CountyEnnis - Big Sky AirportToday 19 Apr15%Sun 20 Apr85%Mon 21 Apr85%Tue 22 Apr10%Wed 23 Apr30%Thu 24 Apr30%Fri 25 Apr35%Ennis - Big Sky Airport rainfall forecast issued today at 7:05 pm. Next forecast at approx. 9:05 am.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