Irwin Rainfall ForecastUnited StatesPAWestmoreland CountyIrwinToday 19 Apr70%Sun 20 Apr55%Mon 21 Apr70%Tue 22 Apr50%Wed 23 Apr10%Thu 24 Apr20%Fri 25 Apr60%Irwin rainfall forecast issued today at 7:04 pm. Next forecast at approx. 9:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Pittsburgh RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads