Typhoon Khanun dumped heavy rains on the nation on Thursday morning, leaving one dead, tens of thousands of households without electricity and major transportation systems at a halt before it subsided in the afternoon.
The government said that the first tropical storm of this year left less-than-feared damage.
The Korean Meteorological Administration cleared most of the typhoon alerts and warnings nationwide as of 1pm (12pm Singapore time).
The state weather agency said that the typhoon reached Korea on Wednesday where it lost its power and turned into an extratropical cyclone in the seas off Sokcho, Gangwon Province. Still, torrential downpours and strong winds were expected to continue until late Thursday night in some parts of the country, it said.