Rock Island Bay Rainfall ForecastUnited StatesNYFranklin CountyRock Island BayToday 19 Apr65%Sun 20 Apr20%Mon 21 Apr60%Tue 22 Apr75%Wed 23 Apr10%Thu 24 Apr15%Fri 25 Apr25%Rock Island Bay rainfall forecast issued today at 6:04 am. Next forecast at approx. 8:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Montague RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads