The mercury on Tuesday dropped to the season's lowest here at 6.3 degrees Celsius against the average temperature of 10 degrees Celsius, according to the Met Department."The lowest temperature in the coming few days is likely to plummet up to 5 degrees Celsius. On January 14, 2017, the minimum temperature in Agartala was also 6.3 degrees Celsius," Department Director Dilip Saha told IANS.