Clear Autumn Skies Nationwide, With Daily Temperature Swings Over 10 Degrees

Morning Lows of 12-20 Degrees Daytime Highs of 24-29 Degrees Rain of Less Than 5 Millimeters Along Parts of the East Coast

Culture|
|
By Lim Jong-hyuns4our@sedaily.com
||
Citizens in long-sleeved clothing walk near Gwanghwamun Square in Seoul's Jongno district on the morning of the 14th, when a wide daily temperature swing was forecast, with morning lows dropping to 14 degrees Celsius and daytime highs rising to 31 degrees. News1 - Seoul Economic Daily Culture News from South Korea
Citizens in long-sleeved clothing walk near Gwanghwamun Square in Seoul's Jongno district on the morning of the 14th, when a wide daily temperature swing was forecast, with morning lows dropping to 14 degrees Celsius and daytime highs rising to 31 degrees. News1

Skies will be mostly clear across South Korea on Tuesday, Sept. 15, with the gap between daytime and nighttime temperatures widening to more than 10 degrees Celsius.

Morning lows are forecast at 12 to 20 degrees Celsius, with daytime highs of 24 to 29 degrees.

Expected morning lows in major cities are 15 degrees in Seoul, 16 in Incheon, 13 in Chuncheon, 17 in Gangneung, 14 in Daejeon, 17 in Daegu, 15 in Jeonju, 17 in Gwangju, 20 in Busan and 21 in Jeju.

Daytime highs are forecast at 27 degrees in Seoul, 26 in Incheon, 26 in Chuncheon, 25 in Gangneung, 26 in Daejeon, 28 in Daegu, 27 in Jeonju, 28 in Gwangju, 28 in Busan and 27 in Jeju.

The gap between daytime and nighttime temperatures will remain wide, at 10 to 15 degrees, across most of the country for the time being.

Skies will be mostly clear nationwide, though the southern regions will see occasional heavy cloud cover. The east coast and mountainous areas of Gangwon Province and the east coast of the Gyeongsang region will be mostly overcast.

Sprinkles of less than 0.1 millimeters will fall along the east coast and in mountainous areas of Gangwon Province through the morning, along the east coast of North Gyeongsang Province in the morning and in parts of Busan in the afternoon. Rain of less than 5 millimeters will fall along the east coast of North Gyeongsang Province and in Ulsan in the afternoon.

Fine dust levels will remain "good" nationwide.

Waves will run 0.5 to 1.5 meters in coastal waters of the East Sea and 0.5 to 1.0 meters in coastal waters of the West Sea and the South Sea. In nearer offshore waters, waves are expected to reach 0.5 to 2.0 meters in the East Sea and the South Sea and 0.5 to 1.5 meters in the West Sea.

Original reporting by Lim Jong-hyun for Seoul Economic Daily.

AI-translated from Korean. Quotes from foreign sources are based on Korean-language reports and may not reflect exact original wording.

Watch · Seoul Economic Daily

More →
2:50
World News Day 2026 — Know the facts. Understand what matters. #ChooseTrustedJournalism

AI KEY

Preview
Korean Corporate Intelligence HubKOSPI · KOSDAQ · 12 sectors

A live, cap-weighted view of every KOSPI and KOSDAQ sector, with same-day Korean reporting distilled by company — built for foreign investors, correspondents and analysts who need to scan Korea before the next session.

Korea Company Atlas

Preview
Market Ontology · The Feedback LoopKFTC 2025 · 92 groups · 121,954 articles

An English ontology of the Korean market — how companies, the media, the government and the National Assembly move each other in a loop. Korea's named controlling persons and designated business groups are a mechanism, not a risk to be priced blind.

SIGNAL

Now live
English Edition · Capital MarketsM&A · IPO · PE · Fund Flows

SIGNAL English Edition is live — Korea's deal desk reporting in English. M&A, IPOs, private equity and fund flows, covered daily for global institutional investors. Browse free; subscriber-only scoops at the 50% intro rate.