Korea's holiday Monday forecast cloudy and chilly with rain in central regions
In short
South Korea's Gaecheonjeol substitute holiday on Monday, 5 October, was forecast to be mostly cloudy and chilly nationwide, with rain from early morning in the central region, Jeolla Province and Jeju. Yonhap said daytime temperatures would be about 5 degrees lower than the previous day, with strong cold winds from the afternoon, and morning lows of 11 to 17C and highs of 19 to 25C. Fine dust levels were forecast to be “good” nationwide.
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South Korea's national weather forecast said rain would fall from early morning to late morning on Monday, 5 October, in the central region, Jeolla Province, northwestern North Gyeongsang inland areas, western South Gyeongsang inland areas and Jeju. Yonhap reported that rain which began on Sunday night would continue until the morning in the capital region, northern Gangwon inland areas, South Chungcheong Province and northwestern North Jeolla Province. [ 1 ]
Expected rainfall over the two days of 4-5 October was 5 to 30mm in Incheon, northern Gyeonggi and the five West Sea islands, and in northern Gangwon inland areas; about 5mm in Daejeon, Sejong and South Chungcheong; and under 5mm in North Jeolla. Gangwon inland and mountain areas were forecast to receive 5 to 20mm, while Seoul and southern Gyeonggi were forecast at 5 to 10mm. Gwangju, South Jeolla, western South Gyeongsang inland areas, northwestern North Gyeongsang inland areas, Jeju and Gangwon's central and northern east coast were forecast to receive under 5mm, according to Yonhap. [ 1 ]
Daytime temperatures were forecast to be about 5 degrees lower than the previous day, with strong cold winds from the afternoon, Yonhap reported, describing conditions as chilly. Morning lows were put at 11 to 17C and daytime highs at 19 to 25C. Fine dust concentrations were expected to be “good” nationwide. Nearshore wave heights were forecast at 0.5 to 2.0 metres in the East Sea, 1.0 to 2.5 metres in the West Sea and 0.5 to 1.0 metres in the South Sea, with higher waves in the open sea. [ 1 , 4 ]
Later items from Yonhap also described Monday as the Gaecheonjeol substitute holiday and the final day of the holiday period, with the country mostly cloudy and chilly. Newsis reported weak rain and an inflow of cold air on Jeju for the same day. Yonhap's Gangwon report said the province would be mostly cloudy and clear gradually from the afternoon, with daytime inland temperatures of 17 to 20C. [ 2 , 3 , 4 , 5 ]
Yonhap said its detailed forecast article was produced using artificial intelligence technology, with the first draft written by AI and based on Korea Meteorological Administration data and other material, then completed and desk-checked by a reporting journalist. The weather service's underlying forecast can also be viewed on its website, the report said. [ 1 ]
Why it matters
The forecast covers the final day of a national holiday weekend, a period when travel and outdoor activity peak, and warns of a sharp one-day drop in daytime temperatures and strong cold winds. Rainfall was expected to be light in most areas, with heavier totals limited to northern Gyeonggi Province and northern Gangwon inland areas. The outlook is routine, but it shapes holiday travel and clothing plans for the day.
Key facts
- Monday, 5 October, was the final day of the Gaecheonjeol holiday period and a substitute public holiday, and was forecast to be mostly cloudy and chilly across the country [ 2 , 4 , 5 ]
- Daytime temperatures were forecast to be about 5 degrees lower than the previous day, with strong cold winds from the afternoon [ 1 , 4 ]
- Morning lows were forecast at 11 to 17C and daytime highs at 19 to 25C [ 1 ]
- Rain was forecast from early morning to late morning in the central region, Jeolla Province, northwestern North Gyeongsang inland areas, western South Gyeongsang inland areas and Jeju [ 1 ]
- Expected rainfall over 4-5 October ranged up to 30mm in Incheon, northern Gyeonggi and the five West Sea islands and northern Gangwon inland areas, about 5mm in Daejeon, Sejong and South Chungcheong, under 5mm in North Jeolla, 5 to 20mm in Gangwon inland and mountain areas, and 5 to 10mm in Seoul and southern Gyeonggi [ 1 ]
- Fine dust concentrations were forecast to be “good” nationwide [ 1 ]
- Newsis reported light rain and an inflow of cold air on Jeju for the final day of the holiday [ 3 ]
- Gangwon Province was forecast to be mostly cloudy and to clear gradually from the afternoon, with daytime inland temperatures of 17 to 20C [ 5 ]
Confirmed by several sources
- The country was forecast to be mostly cloudy and chilly on Monday, 5 October, the final day of the holiday period [ 2 , 3 , 4 ]
- Daytime temperatures were forecast to fall by about 5 degrees from the previous day [ 1 , 4 ]
- Rain was forecast for the central region, Jeolla Province and Jeju [ 1 , 3 ]
- Cold air and strong cold winds were expected [ 1 , 3 ]
Still unclear
- Timing and amount of rain on Jeju beyond “weak rain” Only the Newsis headline mentions Jeju rainfall; the article text published with that item is about unrelated technology subjects and gives no weather details, and no other document specifies Jeju totals beyond under 5mm.
- When rain will end in each region The documents describe rain from early morning to late morning in some areas but do not give clearing times outside Gangwon, which Yonhap said would clear gradually from the afternoon.
What local media are saying
Timeline, local time
- Yonhap publishes a detailed national forecast for 5 October, including rainfall ranges, temperatures, winds, dust levels and sea conditions [ 1 ]
- Yonhap publishes a national outlook describing the holiday's final day as mostly cloudy and chilly [ 2 ]
- Newsis reports weak rain and an inflow of cold air on Jeju for the holiday's final day [ 3 ]
- Yonhap reports the substitute holiday will be mostly cloudy and chilly nationwide, with daytime temperatures about 5 degrees lower than the previous day [ 4 ]
- Yonhap reports Gangwon will be mostly cloudy and clear gradually from the afternoon, with daytime inland temperatures of 17 to 20C [ 5 ]