Weather in Seoul in September
In an average September, Seoul sees a daily high around 26°C and a low around 17°C, based on 1980–2026 of local climate records.
| Average high | 26°C |
|---|---|
| Typical high range | 22°C to 29°C |
| Average low | 17°C |
| Typical low range | 13°C to 21°C |
| Average daily precipitation | 5 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
34°C
2024-09-11
Lowest
15°C
1987-09-26
Low
Highest
25°C
2024-09-13
Lowest
6°C
2011-09-30
Feels-like
Highest
55°C
2024-09-11
Lowest
2°C
1987-09-26
Humidity
Highest
24.6 g/m³
2024-09-11
Lowest
5.0 g/m³
1987-09-26
Wind
Highest
52 km/h
2019-09-07
Lowest
5 km/h
2017-09-05
Gust
Highest
108 km/h
2019-09-07
Lowest
11 km/h
2017-09-06
Precip
Wettest
363 mm
1990
Driest
7 mm
1996
See Seoul's live weather grade →
Visiting Seoul in September? See how its comfort stacks up against where you live.
Compare Seoul with your city →