Río Nigua Mouth Rainfall ForecastUnited StatesPRArroyoRío Nigua MouthToday 19 Apr70%Sun 20 Apr50%Mon 21 Apr40%Tue 22 Apr40%Wed 23 Apr5%Thu 24 Apr20%Fri 25 Apr50%Río Nigua Mouth rainfall forecast issued today at 6:04 pm. Next forecast at approx. 8:04 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