Mount Vernon Airport Rainfall ForecastUnited StatesMEKennebec CountyMount Vernon AirportToday 19 Apr45%Sun 20 Apr15%Mon 21 Apr10%Tue 22 Apr65%Wed 23 Apr5%Thu 24 Apr15%Fri 25 Apr30%Mount Vernon 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 Portland RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads