Weather Forecast: Cloudy Nationwide with Up to 120mm of Rain in Jeju Mountains

by Sooyoung Jang Posted : October 25, 2026, 19:08Updated : October 25, 2026, 19:08

On Monday, the 26th, the weather will be generally cloudy across the country, with increasing clouds in the afternoon. Rain is expected to continue in some areas of the southern region and Jeju Island until the morning.

According to the Korea Meteorological Administration on the 25th, the morning low temperatures on the 26th are forecasted to range from 9 to 18 degrees Celsius, while daytime highs are expected to be between 19 and 25 degrees Celsius.

The expected morning low temperatures in major regions are as follows: △Seoul 15 degrees △Incheon 15 degrees △Suwon 15 degrees △Chuncheon 11 degrees △Gangneung 14 degrees △Daejeon 14 degrees △Cheongju 14 degrees △Gwangju 16 degrees △Jeonju 15 degrees △Busan 17 degrees △Ulsan 17 degrees △Daegu 15 degrees △Jeju 20 degrees.

Daytime high temperatures are forecasted to be: △Seoul 21 degrees △Incheon 20 degrees △Suwon 21 degrees △Chuncheon 21 degrees △Gangneung 19 degrees △Daejeon 24 degrees △Cheongju 23 degrees △Gwangju 25 degrees △Jeonju 25 degrees △Busan 23 degrees △Ulsan 21 degrees △Daegu 22 degrees △Jeju 23 degrees.

Rain that began the previous day will continue until dawn in the mountainous areas of Gangwon, the southern coast of Jeollanam-do, and the eastern coastal and northeastern mountainous regions of Gyeongsangbuk-do. Rain is also expected in parts of Gyeongsangnam-do and Jeju Island until the morning, with light rain of less than 0.1mm anticipated on the eastern coast of Gangwon for a brief period.

The expected precipitation from the 25th to the 26th is as follows: △Gangwon Mountains 5-20mm △Gwangju and Jeollanam-do 10-40mm △Busan, Ulsan, and the southern coast of Gyeongsangnam-do 20-60mm △Gyeongsangnam-do inland, Gyeongsangbuk-do eastern coast, and northeastern mountainous areas 5-40mm. Jeju Island is expected to receive 30-80mm of rain, with some areas in the mountains and midlands anticipating over 120mm.

Strong winds are expected in most areas nationwide from late last night into early this morning, necessitating caution regarding facility management and safety incidents.

Wave heights are forecasted to reach 1.0-2.5m in the East Sea, 0.5-1.5m in the West Sea, and 0.5-2.5m in the South Sea. In the offshore waters (within about 200km of the coastline), wave heights are expected to be 1.0-4.0m in the East Sea, 0.5-3.5m in the West Sea, and 1.5-5.0m in the South Sea.



* This article has been translated by AI.