Grant County International Airport Rainfall ForecastUnited StatesWAGrant CountyGrant County International AirportToday 19 Apr35%Sun 20 AprNo RainMon 21 AprNo RainTue 22 AprNo RainWed 23 AprNo RainThu 24 Apr5%Fri 25 Apr10%Grant County International Airport rainfall forecast issued today at 3:03 am. Next forecast at approx. 5:03 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Spokane RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads