(Photo: Yonhap)
Temperatures returned to seasonal norms Monday, ahead of chillier conditions later in the week.
Daytime highs will rise into the teens in most parts, according to the Korea Meteorological Administration.
But bad levels of ultrafine dust will affect air quality in the capital region and the Chungcheong provinces in the afternoon.
Children, the elderly and people with respiratory issues are advised to take necessary precautions and avoid outdoor activities.
The forecast shows rainfall overnight through Tuesday.
The mercury will drop below the freezing point again by Wednesday morning, with wide temperature gaps expected between day and night.
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