Seoul reached 30.1 degrees Celsius on October 12, tying the city's previous October high recorded on October 3, 1913. Korea's weather service ranks the more recent observation first, but the temperature did not exceed the earlier reading. Daejeon set a higher October record of its own at 31.5 degrees, surpassing its previous 31.2-degree mark.
Rain and an influx of colder air were forecast to end the unusually late heat, with much cooler mornings expected on October 14.