Lake Osoyoos State Park Rainfall ForecastUnited StatesWAOkanogan CountyLake Osoyoos State ParkToday 19 Apr40%Sun 20 Apr20%Mon 21 Apr10%Tue 22 AprNo RainWed 23 Apr5%Thu 24 Apr10%Fri 25 Apr15%Lake Osoyoos State Park rainfall forecast issued today at 4:04 am. Next forecast at approx. 6:04 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