Grain Valley Rainfall ForecastUnited StatesMOJackson CountyGrain ValleyToday 19 Apr75%Sun 20 Apr90%Mon 21 Apr30%Tue 22 Apr25%Wed 23 Apr50%Thu 24 Apr70%Fri 25 Apr65%Grain Valley 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 Kansas City/Pleasant Hill RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads