FPUS46 KSGX 252013 City Forecast for San Diego, CA Issued Wednesday afternoon - Nov 25, 2009 .Wednesday night... Low 52, 0% chance of precipitation. .Thursday... Sunny, high 78, 0% chance of precipitation. .Thursday night... Low 52, 0% chance of precipitation. .Friday... Partly cloudy, high 67. .Friday night... Low 51.