Heavy Rain and Thunderstorms Expected Across South Korea on Sunday

South Korea is set for a cloudy and wet Sunday, with rain expected across most of the country, according to a report from 한겨레. The southern regions are forecast to receive the heaviest downpours, with up to 200mm of rain possible, accompanied by strong winds and lightning.

The report, published on Saturday, August 29, 2026, indicates that the wet weather will not be confined to the south. Other parts of the country, including the capital area, are also expected to see rain, though in smaller amounts. The Seoul metropolitan region is likely to receive between 5 and 20mm, according to additional reporting from v.daum.net.

The cause of the heavy rainfall is a stationary front that has settled over the Korean Peninsula, as detailed by Chosun Ilbo. This weather system is expected to linger into Monday, with the Chungnam region also facing the potential for up to 200mm of intense rain. The forecast from MoneyToday echoes this, warning of heavy downpours exceeding 200mm in the Chungcheong and North Jeolla areas.

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Beyond the rain, the Kyunghyang Shinmun reports that southern parts of the country may experience tropical nights, where temperatures do not drop below 25 degrees Celsius overnight. This combination of heavy rain, strong winds, and warm, humid conditions points to a disruptive end to the weekend for many residents.

With the stationary front expected to remain in place, the risk of flooding and localized damage from the intense rainfall is a key concern. Authorities and residents in the affected southern and central regions should monitor updates closely as the weather system develops through Sunday and into Monday.