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Photo by Basile Morin, CC BY-SA 4.0, via Wikimedia Commons.
Jeju in September
okbusy · worth considering · the wettest month of the year
The year in Jeju
Tap a month for its page
- JanJJeju in January: ok
- FebFJeju in February: ok
- MarMJeju in March: ok
- AprAJeju in April: sweet spot
- MayMJeju in May: sweet spot, busy
- JunJJeju in June: sweet spot
- JulJJeju in July: sweet spot
- AugAJeju in August: ok, busy
- SepSJeju in September: ok, busy
- OctOJeju in October: ok
- NovNJeju in November: good
- DecDJeju in December: ok
- Sweet spot
- Good
- OK
- Avoid
- Busy
Plan this trip
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Flights
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Where to stay
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Travel insurance
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Mobile data (eSIM)
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Renting a pocket Wi-Fi is the other common way to stay connected.
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The numbers
| Daily high | 26°C |
|---|---|
| Nightly low | 22°C |
| Feels like, afternoon | 30°C |
| Rainy days, 1 mm or more | 13 · 342 mm |
| Humidity | 84% |
| Sunshine | 8.1 h/day |
| Daylight | 12.4 h/day |
| Hiking | 10 of 30 days dry and 10–27 °C |
| Beach and sea | 15 of 30 days dry and 23–35 °C; sea not measured |
| Crowds | 51 / 100, higher is quieter |
Ten-year averages for this calendar month. A rainy day is one with at least 1 mm of rain, as a weather station counts it. The model these figures come from drizzles more than a rain gauge, the more so the warmer the month, so its days count from 2 mm, rising to 5 mm in the hottest.
Weather read at Jeju City: ten years of ERA5 and ERA5-Land reanalysis, through Open-Meteo's open data.
How busy it gets
Public holidays in September
Holidays crowd a place out and push fares up around them; they count toward the crowd score above.
Jeju in pictures
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Sgroey, CC BY-SA 4.0, via Wikimedia Commons
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Basile Morin, CC BY-SA 4.0, via Wikimedia Commons
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Bernard Gagnon, CC0, via Wikimedia Commons
What to pack
- Summer clothes by day, highs around 26°C.
- Rain gear you will actually use: about 13 rainy days and 342 mm.
- Sun protection: about 8 hours of sunshine a day.
- Humidity averages 84%; breathable fabrics dry faster.
Each line is a threshold over the ten-year figures above, not advice from anywhere else.
Before you go
Type C and F plugs at 220 V. Drives on the right. The currency is the Won. No UK Foreign Office advice against travel. Global Affairs Canada: Exercise normal security precautions. US State Department: Level 1: Exercise Normal Precautions. Everything for South Korea: cost of living, languages, emergency numbers and health.
On arrival in Jeju: the apps, paying, getting around, tipping and the emergency numbers.
September elsewhere
- Everywhere in September
- Beaches in September
- Islands in September
- Mountains in September
- East Asia in September
In September from
The other months at Jeju
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