FPUS42 KCHS 141925 City Forecast for Savannah, GA Issued Monday afternoon - Mar 14, 2011 .Monday night... Low 52, 5% chance of precipitation. .Tuesday... Partly cloudy, high 79, 10% chance of precipitation. .Tuesday night... Low 54, 20% chance of precipitation. .Wednesday... Partly cloudy, high 80. .Wednesday night... Low 47.