Fort Chartres State Park Rainfall ForecastUnited StatesILRandolph CountyFort Chartres State ParkToday 18 Apr20%Sat 19 Apr95%Sun 20 Apr80%Mon 21 Apr90%Tue 22 AprNo RainWed 23 Apr20%Thu 24 Apr50%Fort Chartres State Park rainfall forecast issued today at 8:05 pm. Next forecast at approx. 10:05 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time St Louis RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads