Keep Cool Lakes Rainfall ForecastUnited StatesMTLewis and Clark CountyKeep Cool LakesToday 19 Apr40%Sun 20 Apr60%Mon 21 Apr85%Tue 22 Apr25%Wed 23 Apr25%Thu 24 Apr30%Fri 25 Apr40%Keep Cool Lakes 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 Great Falls RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads