Potomac River - Colton Point Rainfall ForecastUnited StatesMDSt Marys CountyPotomac River - Colton PointToday 16 Apr5%Thu 17 AprNo RainFri 18 AprNo RainSat 19 Apr25%Sun 20 Apr25%Mon 21 Apr15%Tue 22 Apr40%Potomac River - Colton Point rainfall forecast issued today at 2:04 am. Next forecast at approx. 4:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Sterling RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads