Williamsport Rainfall ForecastUnited StatesINWarren CountyWilliamsportToday 19 Apr95%Sun 20 Apr50%Mon 21 Apr90%Tue 22 AprNo RainWed 23 Apr10%Thu 24 Apr35%Fri 25 Apr60%Williamsport rainfall forecast issued today at 10:04 pm. Next forecast at approx. 12:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Indianapolis RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads