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South Korea is set for a significant temperature drop Tuesday morning, with lows falling 5-8 degrees from Monday to between 0 and 9 degrees Celsius, according to Yonhap and Maeil Business Newspaper. The Korea Meteorological Administration expects frost in most inland areas, with some inland and mountainous regions dipping below freezing, while daytime highs will reach 15-19 degrees, creating a large diurnal range. KBS World reports cold air moving southward from the northwest, and Maeil Business Newspaper advises residents to bring out padded jackets as the chill sets in. Korean news outlets are framing this as a notable seasonal shift, with Maeil Business Newspaper warning of frost and ice formation in some areas and urging caution over the wide temperature swings.