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Jeju weather in September 2026
Expect daytime maximum temperatures of 26°C in Jeju, South Korea in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 188 mm of rainfall in the month.
- 26°C max day temperature
26 - 6 hours of sunshine per day
- 10 days with some rainfall
10 - 19°C min night temperature
19 - 12 hours of daylight per day
12 - Low heat & humidity
L - 188 mm of monthly rainfall
188 - 8 (Very High) UV index
8 - 25°C sea temperature
25
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Recommended for South Korea
The September weather guide for South Korea (Jeju) 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 Jeju in September?
Daytime temperatures usually reach 25°C in Jeju in September with low heat and humidity, falling to 16°C at night.
How sunny is it in Jeju in September?
There are normally 7 hours of bright sunshine each day in Jeju in September - that's 54% of daylight hours.
Does it rain in Jeju in September?
There are usually 9 days with some rain in Jeju in September and the average monthly rainfall is 161mm.
What is the chance of a typhoon in Jeju in September?
On average less than 1 day in September in Jeju is likely to be affected by the passage of one or more tropical storms.
Jeju September sunrise & sunset times
Browse the sunrise and sunset times for Jeju in September 2026. Select a month to view Jeju sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Tuesday, 1st September 2026 | 06:08 | 19:00 |
| Tuesday, 15th September 2026 | 06:17 | 18:41 |
| Wednesday, 30th September 2026 | 06:27 | 18:20 |
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