Seoul · South Korea
September
Monsoon eases — conditions improving rapidly; Chuseok harvest festival is uniquely Korean.
Best match
#4 of 12 months
There are better months for Seoul — see the full ranking below.
See when to go instead →Climate
High
25.1°C
Low
17.5°C
Rain
138mm
Sun
7hrs/day
30-year climate normals · Open Meteo ERA5
How September scores in Seoul
Weather
Very good
Value
Good
Crowds
Good
Events
Very good
Atmosphere
Very good
What you gain in September
- ↑Chuseok (Harvest Festival): one of Korea's most important cultural celebrations — traditional food, family gatherings, hanbok everywhere
- ↑25°C: outdoor Seoul becoming manageable again
- ↑Prices reasonable as tourism hasn't yet returned to autumn peak
What you sacrifice
- ↓138mm still significant — monsoon not fully over
- ↓Chuseok week: some shops and restaurants closed; domestic travel surge means transport crowded
- ↓Autumn foliage hasn't arrived yet — the best is still weeks away
How September compares to October (best month)
| Factor | September | October ★ |
|---|---|---|
| Weather | 7 | 9 |
| Value | 6 | 5 |
| Crowds | 6 | 4 |
September in other destinations
Climate data: 30-year normals (1991–2020) from Open Meteo ERA5 reanalysis. Scores compare months within Seoul, not across destinations. Methodology →