On Friday, the 13th, South Korea is expected to experience mild weather with daytime temperatures reaching up to 16 degrees Celsius. However, citizens are advised to be cautious about respiratory health due to poor air quality throughout the country. The Korea Meteorological Administration forecasts generally clear skies, transitioning to cloudy in the afternoon, with possible light rain or snow in northeastern Gyeonggi Province and northern Gangwon Province.

Morning temperatures are anticipated to range between -6 and 4 degrees Celsius, while daytime highs will fluctuate between 8 and 16 degrees Celsius, indicating a warmer-than-average day. Key regional morning temperatures include 3.7 degrees in Seoul and 5.9 degrees in Gangneung. The highest expected daytime temperatures are around 11 degrees in Seoul, 15 degrees in Daegu, and 15 degrees in Busan, showcasing a broad reach of similar spring-like temperatures across the nation.

However, caution is advised due to dense fog in regions such as Incheon and the western coast of Gyeonggi Province, reducing visibility to under 200 meters, and icy conditions could appear on roads. Additionally, with dry weather warnings in effect for the eastern coast of Gangwon and various areas in Gyeongsang Province, there is a heightened risk of fires. Overall, fine dust levels are projected to be high due to air stagnation and external influx, particularly affecting regions like the capital area and parts of the western coast, prompting public health advisories throughout the evening.