Potomac Rainfall ForecastUnited StatesILVermilion CountyPotomacToday 18 Apr20%Sat 19 Apr80%Sun 20 Apr75%Mon 21 Apr85%Tue 22 Apr5%Wed 23 Apr15%Thu 24 Apr30%Potomac 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 Lincoln RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads