Illinois Beach State Park Rainfall ForecastUnited StatesILLake CountyIllinois Beach State ParkToday 18 Apr55%Sat 19 Apr55%Sun 20 Apr60%Mon 21 Apr95%Tue 22 Apr15%Wed 23 Apr35%Thu 24 Apr30%Illinois Beach State Park rainfall forecast issued today at 9:04 pm. Next forecast at approx. 11:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Milwaukee RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads