Riverside Airport Rainfall ForecastUnited StatesWAWhatcom CountyRiverside AirportToday 18 Apr25%Sat 19 Apr20%Sun 20 Apr80%Mon 21 Apr40%Tue 22 Apr5%Wed 23 Apr5%Thu 24 Apr20%Riverside Airport rainfall forecast issued today at 5:04 pm. Next forecast at approx. 7:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Seattle RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads