Ontonagon Rainfall ForecastUnited StatesMIOntonagon CountyOntonagonToday 21 Apr100%Tue 22 Apr15%Wed 23 Apr25%Thu 24 Apr35%Fri 25 Apr65%Sat 26 Apr10%Sun 27 Apr10%Ontonagon rainfall forecast issued today at 3:04 pm. Next forecast at approx. 5:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Marquette RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads