What to Wear in Seoul in September
Warm and clear — one of the best months. Expect 18°–26°C with 9 rainy days on average.
☀️
High
26°C
🌙
Low
18°C
🌧️
Rain days
9
🌡️
Feel
Pleasantly Warm
Typical outfit
~22°C average
About September in Seoul
September in Seoul typically brings warm and clear — one of the best months. With averages of 18°–26°C, the conditions call for perfect weather for exploring! light layers will keep you comfortable all day.
The classic "three-layer" rule works perfectly here: a base, a mid-layer, and something for wind.
September in other cities