St. John Airport Rainfall ForecastUnited StatesMDBaltimore CountySt. John AirportToday 18 AprNo RainSat 19 Apr10%Sun 20 Apr10%Mon 21 Apr10%Tue 22 Apr35%Wed 23 Apr10%Thu 24 Apr10%St. John Airport rainfall forecast issued today at 9:05 pm. Next forecast at approx. 11:05 am.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