Brentwood Rainfall ForecastUnited StatesCAContra Costa CountyBrentwoodToday 15 Apr5%Wed 16 Apr5%Thu 17 Apr5%Fri 18 AprNo RainSat 19 AprNo RainSun 20 AprNo RainMon 21 AprNo RainBrentwood rainfall forecast issued today at 5:03 am. Next forecast at approx. 7:03 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Sacramento RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads