Chief Plenty Coups State Park Rainfall ForecastUnited StatesMTBig Horn CountyChief Plenty Coups State ParkToday 19 AprNo RainSun 20 Apr55%Mon 21 Apr90%Tue 22 Apr50%Wed 23 Apr40%Thu 24 Apr40%Fri 25 Apr50%Chief Plenty Coups State Park 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 Billings RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads