Arroyo Alto Rainfall ForecastUnited StatesTXCameron CountyArroyo AltoToday 18 AprNo RainSat 19 AprNo RainSun 20 Apr35%Mon 21 Apr35%Tue 22 Apr35%Wed 23 Apr25%Thu 24 Apr10%Arroyo Alto 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 Brownsville RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads