Jeju weather in September
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Jeju September weather at a glance
In September, Jeju averages 26.4°C, with typical highs of 28.8°C and lows of 24.5°C. The historical average is 23 wet days and 84% humidity.
Jeju September temperature & humidity
Jeju September rain & wet days
Pack a light rain jacket, waterproof pouch and quick-dry shoes. Keep an indoor stop available between outdoor activities.
What to wear in Jeju in September
Choose breathable summer clothes and pack sun protection. Rain is frequent at roughly 23 days in the month; pack a rain jacket and water-resistant shoes. High humidity makes quick-dry clothing and a spare top especially useful.
- DaytimeBreathable short sleeves, hat and sunscreen · average high 28.8°C
- Morning & eveningLight layer for air-conditioned rooms · average low 24.5°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Jeju September sunrise & sunset times
2026 September · Local time (Asia/Seoul)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-09-01 | 06:08 | 19:00 | 12h 52m |
| 2026-09-15 | 06:17 | 18:41 | 12h 24m |
| 2026-09-30 | 06:27 | 18:20 | 11h 53m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
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Best months to visit Jeju
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
September weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Jeju weather like in September?
In September, Jeju averages 26.4°C, with typical highs of 28.8°C and lows of 24.5°C. The historical average is 23 wet days and 84% humidity. Our weather-comfort rating for this month is challenging.
Does it rain a lot in Jeju in September?
There are about 23 wet days in September. Pack a rain jacket and water-resistant shoes.
What should I wear in Jeju in September?
Choose breathable summer clothes and pack sun protection. Rain is frequent at roughly 23 days in the month; pack a rain jacket and water-resistant shoes. High humidity makes quick-dry clothing and a spare top especially useful.
What are the best months to visit Jeju?
Recent weather data rates May among the more comfortable months.
Where can I check Jeju weather in September in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Jeju in September?
On 2026-09-15, calculated sunrise is 06:17 and sunset is 18:41 in local time (Asia/Seoul). Times vary by date and terrain.
Jeju weather by month
More South Korea destinations in September
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations