Cool Northeast Wind Pushes Heat Away Completely... Daytime Highs 22-29 Degrees Celsius

Heatwave Advisories Lifted Nationwide... Occasional Autumn Rain Also Falls

Rain Prompting Autumn (Suwon=Yonhap News) Reporter Hong Ki-won = Citizens with umbrellas walk through fountain grass in Seohogotme-gong Park, Paldal-gu, Suwon-si, Gyeonggi Province, on the 17th, as rain prompts autumn. 2025.9.17 xanadu@yna.co.kr

With the heat being pushed away by a cool northeast wind, it will feel distinctly autumnal on the 18th.

As the heatwave advisories issued for Jeju and the southern region were lifted at 4 p.m. the previous day, there are now no areas nationwide under a heatwave advisory.

As of 8 a.m., the temperatures in major cities are around 20 degrees Celsius: Seoul 20.2, Incheon 19.8, Daejeon 21.1, Gwangju 22.5, Daegu 22, Ulsan 21.3, and Busan 22.9.

Daytime high temperatures are also expected to remain between 22 and 29 degrees Celsius.

Daegu and Ulsan will reach a daytime high of 24 degrees, Seoul, Incheon, and Daejeon will reach 26 degrees, and Gwangju and Busan will reach 27 degrees.

Due to a low-pressure system that brought rain the previous day and a high-pressure system in northeastern China forming a 'high in the north, low in the south' pressure pattern over the East Sea, intermittent rain will fall in most areas until the afternoon due to the influence of the easterly winds and the pressure trough.

The precipitation amounts will be low, at most 5-20 mm.

Rain is also expected nationwide on the 19th and 20th.

During this period, significant autumn rain, around 20-60 mm, is expected in southern Gyeonggi, Chungcheong, Honam, and Gyeongbuk regions.

Strong winds of around 55 km/h (15 m/s) will blow on the coastal areas of Gyeongsang on this day.

High waves will surge along the east coast due to swells.

At sea, strong winds of 30-55 km/h (9-15 m/s) and high waves of 1.5-3.5 meters are expected in the inner offshore waters of the central East Sea and the nearshore waters of the central East Sea until the morning, in the nearshore waters of northern Gyeongbuk until the afternoon, and in the outer offshore waters of the central East Sea and the northern offshore waters of the southern East Sea until night.

The southern offshore waters of the southern East Sea and the eastern offshore waters of the southern Sea will also experience gradually rougher seas from the afternoon, so caution is advised for navigation and fishing. Yonhap News