Rock Island Rainfall ForecastUnited StatesTXColorado CountyRock IslandToday 19 Apr20%Sun 20 Apr70%Mon 21 Apr60%Tue 22 Apr60%Wed 23 Apr75%Thu 24 Apr35%Fri 25 Apr35%Rock Island rainfall forecast issued today at 9:04 pm. Next forecast at approx. 11:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time San Antonio RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads