ClimaGo › Seoul › Weather in September
South Korea
Early autumn brings cooling temperatures around 24°C with decreasing humidity and occasional rain showers, creating ideal conditions for hiking Korean mountains and exploring historic neighborhoods without summer crowds.
Avg High
26°C
Avg Low
17°C
Daily Rain
4.5mm
Rainfall
Moderate
✅ September is one of the best months to visit Seoul!
South Korea's dynamic capital electrifies with K-pop culture, cutting-edge technology, ancient palaces, vibrant neighborhoods and thriving street food scene.