Waimea Canyon State Park Rainfall ForecastUnited StatesHIKauaiWaimea Canyon State ParkToday 19 Apr55%Sun 20 Apr55%Mon 21 Apr55%Tue 22 Apr75%Wed 23 Apr75%Thu 24 Apr75%Fri 25 Apr65%Waimea Canyon State Park rainfall forecast issued today at 2:04 am. Next forecast at approx. 4:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time South Kauai RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads