Long Island Mac Arthur Airport Rainfall ForecastUnited StatesNYSuffolk CountyLong Island Mac Arthur AirportToday 19 Apr15%Sun 20 Apr20%Mon 21 Apr5%Tue 22 Apr55%Wed 23 Apr5%Thu 24 Apr5%Fri 25 Apr20%Long Island Mac Arthur Airport rainfall forecast issued today at 5:04 am. Next forecast at approx. 7:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Upton RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads