FPUS45 KCYS 200952 City Forecast for Sidney, NE Issued Thursday morning - Oct 20, 2005 .Thursday... Partly cloudy, high 69, 0% chance of precipitation. .Thursday night... Low 43, 20% chance of precipitation. .Friday... Mostly cloudy, high 59, 20% chance of precipitation. .Friday night... Low 33. .Saturday... High 57.