Weather Forecast: Clear Skies and Early Summer Heat with Highs Reaching 34°C

By Lee Seongjin Posted : May 17, 2026, 17:42 Updated : May 17, 2026, 17:42
Photo by Yonhap News
On Monday, May 18, clear skies are expected across the country, with daytime temperatures exceeding 30 degrees Celsius, leading to hot weather conditions.

According to the Korea Meteorological Administration on May 17, the morning low temperatures on May 18 are forecasted to range from 12 to 20 degrees Celsius, while the daytime highs will reach between 24 and 34 degrees Celsius. These temperatures are above the seasonal averages of 10 to 15 degrees in the morning and 21 to 26 degrees during the day, with most regions expected to see highs above 30 degrees Celsius.

With the significant rise in temperatures, it is advised that vulnerable populations, such as the elderly, take special care when engaging in outdoor activities.

The expected morning low temperatures in major cities are as follows: Seoul 16°C, Incheon 15°C, Chuncheon 14°C, Gangneung 20°C, Daejeon 16°C, Daegu 18°C, Jeonju 15°C, Gwangju 15°C, Busan 18°C, and Jeju 17°C.

The forecasted daytime highs are: Seoul 30°C, Incheon 28°C, Chuncheon 32°C, Gangneung 31°C, Daejeon 30°C, Daegu 34°C, Jeonju 31°C, Gwangju 32°C, Busan 27°C, and Jeju 25°C, with a significant temperature difference of around 15 degrees Celsius expected, especially in inland areas.

The skies nationwide will generally be clear, but clouds will increase in the evening. The fine dust levels are expected to be at a 'good' to 'moderate' level across the country.

Sea conditions will see waves of 0.5 to 1.0 meters in the East Sea, and around 0.5 meters in the West and South Seas, while offshore wave heights are predicted to be 0.5 to 1.5 meters in the East and West Seas, and 0.5 to 1.0 meters in the South Sea.



* This article has been translated by AI.

Copyright ⓒ Aju Press All rights reserved.