# Late-Summer Heat Gives Way to Heavy Autumn Rain Across Korea This Weekend

- URL: https://hallyu-brief.vercel.app/en/news/autumn-heat-then-heavy-rain-korea-weekend-e44efd
- Published: 2026-10-17T09:57:07.486Z
- Publisher: Hallyu Brief

> Afternoon temperatures climbed above 30°C in parts of Korea on October 17, and forecasters warn of heavy rain, gusts and lightning nationwide from early Sunday.

## Key points

1. Buan County in Jeonbuk reached 30.3°C on October 17, according to YTN.
2. Up to 80mm of rain and 30mm per hour are forecast in most regions.
3. Seoul's morning low may fall to 4°C by Thursday, per the forecast.

## 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.

## FAQ

### Will it rain in Seoul this weekend?

Yes. Heavy rain with gusts and lightning is forecast to reach Seoul and nationwide starting early Sunday, according to the forecast reported by YTN.

### How cold will Seoul get later this week?

Seoul's morning low may fall to 4°C by Thursday, according to the forecast reported by YTN.

## Sources

- [YTN](https://www.ytn.co.kr/_ln/0108_202610171653343525)

_Written and translated with AI from official announcements and Korean media reports. If something is wrong, please let us know._