The Arboretum at Penn State Rainfall ForecastUnited StatesPACentre CountyThe Arboretum at Penn StateToday 19 Apr70%Sun 20 Apr45%Mon 21 Apr45%Tue 22 Apr70%Wed 23 Apr10%Thu 24 Apr15%Fri 25 Apr55%The Arboretum at Penn State 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 State College RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads