Simi Valley Rainfall ForecastUnited StatesCAVentura CountySimi ValleyToday 13 AprNo RainMon 14 Apr5%Tue 15 Apr5%Wed 16 Apr5%Thu 17 Apr15%Fri 18 Apr20%Sat 19 AprNo RainSimi Valley rainfall forecast issued today at 11:04 pm. Next forecast at approx. 1:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Los Angeles RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads