Otter Rainfall ForecastUnited StatesMTPowder River CountyOtterToday 19 Apr15%Sun 20 Apr55%Mon 21 Apr85%Tue 22 Apr40%Wed 23 Apr35%Thu 24 Apr40%Fri 25 Apr30%Otter rainfall forecast issued today at 4:04 pm. Next forecast at approx. 6:04 am.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