Union Rainfall ForecastUnited StatesILMcHenry CountyUnionToday 18 Apr60%Sat 19 Apr50%Sun 20 Apr65%Mon 21 Apr95%Tue 22 Apr20%Wed 23 Apr40%Thu 24 Apr30%Union 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 Chicago RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads