A warm autumn day in Seoul with a daytime temperature of 25 degrees... Heavy rain nationwide on Sunday
Quick Look
- Saturday, the 17th, will be mostly clear across the country and daytime temperatures will rise significantly, making it warm, but it will gradually become cloudy starting at night, and strong rain accompanied by gusty winds is expected to fall across the country on Sunday.
- Rain begins early Sunday in Incheon, northern Gyeonggi Province, and Jeju Island and spreads to most areas across the country in the afternoon.
- It stops at night in the central region, but may continue until Monday in the southern region and Jeju Island.
AI-generated summary
Why It Matters
On Saturday the 17th, the entire country was mostly clear and the daytime temperature rose significantly, showing mild weather. However, as clouds flowed in from the West Sea starting at night, it gradually became cloudy starting from the western region, and strong rain accompanied by gusty winds is expected to fall across the country on Sunday.
On Saturday the 17th, the entire country will be mostly clear and daytime temperatures will rise significantly, making it warm. It will gradually become cloudy starting this evening, and strong rain accompanied by gusty winds will fall across the country on Sunday.
According to the Korea Meteorological Administration, the entire country will be mostly clear on this day due to the influence of high pressure in the East Sea.
The highest temperature during the day was expected to be 21 to 27 degrees. Daytime temperatures will rise significantly to 25 degrees in Seoul, Incheon, Suwon, and Cheongju, 26 degrees in Daejeon, Sejong, and Gwangju, and 27 degrees in Jeonju.
As daytime temperatures rise, the temperature difference between day and night will be very large, around 15 degrees, especially in the inland areas of the country, so the Korea Meteorological Administration has urged people to take care of their health.
There will be strong winds in most parts of the country this afternoon, and at night, as clouds flow in from the West Sea, it will gradually become cloudy starting from the western region.
On Sunday, it will be mostly cloudy and rainy across the country.
Rain will begin early Sunday in Incheon, northern Gyeonggi Province and Jeju Island, spread to other central regions in the morning, and spread to most areas across the country from the afternoon.
In the central region, it will stop at night, but in the southern region, it may continue until Monday morning, and in Jeju Island, it may continue until Monday day.
This rain will be accompanied by gusts of wind and thunder and lightning, so be especially careful about safety accidents in rainy areas.
The expected precipitation is 30 to 80 mm in the metropolitan area, 5 islands in the West Sea, Daejeon, Sejong, South Chungcheong, North Chungcheong Province and Jeonbuk, 20 to 70 mm in inland Gangwon and mountainous areas, and 20 to 60 mm in Gwangju and South Jeolla Province. Rain amounts of 10 to 50 mm are expected to fall in the inland and northeastern mountains of Gyeongbuk, Busan, Ulsan and Gyeongnam, and 5 to 40 mm in Daegu, the southern inland Gyeongbuk, the east coast of Gyeongbuk, Ulleungdo and Dokdo.
The lowest temperature on Sunday morning was forecast to be 11 to 20 degrees, and the highest temperature during the day was forecast to be 20 to 27 degrees.
What to Watch
AI outlook — possibilities, not facts
Rain will begin early Sunday in Incheon, northern Gyeonggi Province, and Jeju Island, spreading to the central region in the morning and most areas across the country from the afternoon.
Very likely · Within days
Rain will stop in the central region at night, but in the southern region, rain will continue until Monday morning and on Jeju Island until Monday day.
Likely · Within days
Open Questions
- What is the specific amount of damage caused by this rain?
- What are the specific guidelines for preventing safety accidents caused by gusts of wind, thunder, and lightning?


![[Weather] Saturday was clear, then clouds started at night... Large daily temperature difference and strong wind](/api/img?u=https%3A%2F%2Fimg.yna.co.kr%2Fphoto%2Fyna%2FYH%2F2026%2F09%2F11%2FPYH2026091103220001300_P2.jpg&w=320&q=72&f=webp)

![[Weather] Beware of large daily temperature ranges across the country… Raindrops until dawn in the northern Gyeonggi and Gangwon mountains](/api/img?u=https%3A%2F%2Fimg.yna.co.kr%2Fphoto%2Fyna%2FYH%2F2026%2F10%2F14%2FPYH2026101403830001300_P2.jpg&w=320&q=72&f=webp)

