Cupey Rainfall ForecastUnited StatesPRSan JuanCupeyToday 19 Apr70%Sun 20 Apr80%Mon 21 Apr40%Tue 22 Apr60%Wed 23 Apr30%Thu 24 Apr30%Fri 25 Apr40%Cupey 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 San Juan RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads