The Florida Keys Marathon Airport Rainfall ForecastUnited StatesFLMiddle Keys in Monroe CountyThe Florida Keys Marathon AirportToday 19 Apr5%Sun 20 AprNo RainMon 21 AprNo RainTue 22 Apr10%Wed 23 Apr10%Thu 24 Apr10%Fri 25 Apr15%The Florida Keys Marathon Airport 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 Key West RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads