Clear skies tomorrow in Seoul and three other cities… high of 28°C

Clear skies forecast for Seoul, Busan, Gangneung and Jeju on September 22

From overnight through the evening on Tuesday, September 22, 2026, a high-pressure system is expected to be located near each of Seoul, Busan, Gangneung and Jeju. Forecast low and high temperatures are 19°C and 28°C in Seoul, 20°C and 27°C in Busan, 17°C and 25°C in Gangneung, and 20°C and 26°C in Jeju, respectively. Skies are forecast to be clear in all four areas, with a 10% probability of precipitation and 0 mm of precipitation forecast in each.

Seoul temperatures and humidity by time on September 22

With a high-pressure system expected to be located near Seoul from overnight through the evening on Tuesday, September 22, 2026, the forecast for Seoul at 9:00 is 23°C, 62% humidity, winds at 2 m/s, clear skies, a 10% probability of precipitation, and 0 mm of precipitation per hour. At 21:00 the same day, the forecast is 23°C, 59% humidity, winds at 1 m/s, clear skies, a 10% probability of precipitation, and 0 mm of precipitation per hour. The temperature is forecast to be 23°C at both times, with no difference between them; the probability of precipitation and hourly precipitation are also forecast to be the same at both times.

Temperatures and humidity in Busan, Gangneung and Jeju on September 22

On Tuesday, September 22, 2026, the low and high temperatures in Busan are forecast to be 20°C and 27°C. In Gangneung, they are expected to be 17°C and 25°C, and in Jeju, 20°C and 26°C. The probability of precipitation is forecast at 10% in Busan, Gangneung and Jeju, and precipitation is expected to be 0 mm in all three areas. Humidity is listed as 50% in Busan, 64% in Gangneung and 67% in Jeju. Clear skies are expected in all three areas.