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Seoul weather in September 2025
Expect 25°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Seoul in September. Check more long-term weather averages for Seoul in September before you book your next holiday to South Korea in 2025/2026.
- 2525°C max day temperature
- 7 hours of sunshine per day
- 99 days with some rainfall
- 1616°C min night temperature
- 1212 hours of daylight per day
- LLow heat & humidity
- 161161 mm of monthly rainfall
- 77 (High) UV index
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Recommended for Seoul
The September weather guide for South Korea (Seoul) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
How hot is it in Seoul in September?
Daytime temperatures usually reach 25°C in Seoul in September with low heat and humidity, falling to 16°C at night.
How sunny is it in Seoul in September?
There are normally 7 hours of bright sunshine each day in Seoul in September - that's 54% of daylight hours.
Does it rain in Seoul in September?
There are usually 9 days with some rain in Seoul in September and the average monthly rainfall is 161mm.
What is the chance of a typhoon in Seoul in September?
On average less than 1 day in September in Seoul is likely to be affected by the passage of one or more tropical storms.
Seoul September sunrise & sunset times
Browse the sunrise and sunset times for Seoul in September 2025. Select a month to view Seoul sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 06:02 | 19:01 |
Monday, 15th September 2025 | 06:14 | 18:40 |
Tuesday, 30th September 2025 | 06:26 | 18:17 |
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