What happened with the weather?

Afternoon temperatures rose well above normal across Korea on October 17, 2026. According to YTN meteorologist Maeng Hee-jeong, Buan County in North Jeolla Province reached 30.3°C, while Seoul hit 26.7°C and Jeonju 28.8°C. The late-summer warmth was strongest in the western regions.

When will the heavy rain arrive?

Forecasters expect a sharp change from early Sunday, with rain starting in Incheon and northern Gyeonggi before spreading nationwide. Strong winds and lightning are also expected, and a strong wind advisory is already in place for the Jeonnam coast.

| Forecast item | Details | |---|---| | Total rainfall | Up to 80mm | | Peak intensity | Up to 30mm per hour in most areas | | Seoul morning low (Sunday) | 17°C, about 5°C above normal | | Busan morning low (Sunday) | 19°C, about 9°C above normal |

How cold will it get?

After the weekend rain, another cold rain is expected in southern regions on Tuesday. By Thursday, Seoul's morning low may drop to 4°C, a steep fall as late autumn sets in.

For international fans

If you are planning outdoor plans in Korea this weekend, expect rain, gusts and lightning from early Sunday, then cooler mornings later in the week. Keep an eye on official weather alerts from the Korea Meteorological Administration.