Western South Korea will experience early-summer heat today, with Seoul's daytime temperature expected to reach 30°C [2].

The divergent weather patterns create simultaneous risks of heat-related stress in urban centers and wind-driven hazards in the south, complicating national travel and safety precautions.

According to YTN News, the western regions are seeing a temperature increase of one to five degrees compared to yesterday [4]. While Seoul is forecast to hit 30°C [2], Gwangju is expected to reach 28°C [4]. Early morning readings showed Seoul at 20.9°C [1] and Daegu at 18.7°C [3].

Contrastingly, the east and south coasts, including Busan, Ulsan, and Sokcho, are facing cooler and wetter conditions. The forecast for Sokcho at midday is 22°C [5].

Jeju Island is currently under the influence of a low-pressure trough, which has triggered a strong-wind warning for several areas [7]. YTN News said that some regions of the island may receive up to 60mm of additional rain by tomorrow [6].

Weather officials said the combination of seasonal heat in the west and atmospheric instability in the south is driving these contrasting conditions. The strong-wind warnings for Jeju remain active as the low-pressure system continues to affect the region [7].

Seoul daytime temperatures reaching about 30°C

The stark contrast between the heat in the west and the storm warnings in the south highlights the volatile transition into the Korean summer monsoon season. The presence of a low-pressure trough over Jeju while the mainland heats up suggests a fragmented atmospheric pattern that can lead to sudden, localized weather extremes.