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Lingering Late-Summer Heat; Mind Large Temperature Gaps and Strong UV Rays

Published : Sep 19, 2026 4:12 PM

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There is a significant temperature difference between day and night.

This morning, the temperature in Seoul started at 20°C (68°F), but it has already exceeded 28°C (82°F).

Tomorrow's daytime temperatures will climb just as high as today's.

You should be mindful of the wide temperature gaps between daytime and nighttime.

Rain that had been falling in the east coast regions due to easterly winds has mostly stopped, with only light raindrops expected to fall intermittently until this afternoon.

Clear autumn skies will continue tomorrow, requiring caution against strong UV rays during the day. Meanwhile, strong swelling waves are expected to roll into the coastal areas of Jeju and the southern coast, so people should refrain from approaching the shoreline.

Tomorrow morning's temperature is expected to drop to 15°C (59°F) in Chuncheon, while daytime temperatures will reach 30°C (86°F) in Gwangju, continuing the late-summer heat.

Mostly clear weather is expected to continue next week, and temperatures will return to seasonal averages once the Chuseok holiday begins.