Lakeside (Flathead Lake) Rainfall ForecastUnited StatesMTFlathead CountyLakeside (Flathead Lake)Today 20 Apr35%Mon 21 Apr75%Tue 22 Apr25%Wed 23 Apr10%Thu 24 Apr5%Fri 25 Apr10%Sat 26 Apr40%Lakeside (Flathead Lake) rainfall forecast issued today at 4:04 pm. Next forecast at approx. 6:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Missoula RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads