Seoul Weather in September – Average Temperature and Rainfall
- High
- 25.3°
- Low
- 17.4°
- Rainfall
- 160 mm
- Rainy season
- 9d
- max
- 32.7°
- min
- 9.5°
September
- Early
- 26.6° 79.8 mm
- Mid
- 25.7° 54.6 mm
- Late
- 23.5° 25.7 mm
Summary
The climate figures for Seoul are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,300 mm.
The rainy season runs May–September. The wettest month is July with 313.4 mm across 17 rain days; the driest is January at just 18 mm.
The hottest month is August (average high 29.4°C) and the coolest is January (1.9°C).
The most comfortable time to visit Seoul is January — less rain and milder heat.
Monthly averages
Common questions
Will it rain in Seoul today?
No. The chance of rain today is only about 0%.
How hot is it in Seoul today?
Between 16°C and 28°C, with a felt maximum of 29°C.
What is the weather in Seoul tomorrow?
Tomorrow: mainly clear, 17–28°C, with a 0% chance of rain.