Jeju weather in December 2025

Expect 11°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Jeju in December based on long-term weather averages. There is usually 10 days with some rainfall and 47 mm of average monthly rainfall in December.

  • 11°C maximum daytime temperature in December in Jeju11
    11°C max day temperature
  • 4 hours of sunshine per day
  • 10 days with some rainfall in December in Jeju10
    10 days with some rainfall
  • 3°C minimum night-time temperature in December in Jeju3
    3°C min night temperature
  • 10 hours of daylight per day in December in Jeju10
    10 hours of daylight per day
  • No heat & humidity in December in Jeju0
    No heat & humidity
  • 47 mm monthly rainfall in December in Jeju47
    47 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in December in Jeju3
    3 (Moderate) UV index
  • 17°C sea temperature in December in Jeju17
    17°C sea temperature

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The December 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)

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How warm is it in Jeju in December?

Daytime temperatures usually reach 11°C in Jeju in December, falling to 3°C at night.

How sunny is it in Jeju in December?

There are normally 4 hours of bright sunshine each day in Jeju in December - that's 41% of daylight hours.

How warm is the sea around Jeju in December?

The average sea temperature around Jeju in December is 17°C.

Does it rain in Jeju in December?

There are usually 10 days with some rain in Jeju in December and the average monthly rainfall is 47mm.

Jeju December sunrise & sunset times

Browse the sunrise and sunset times for Jeju in December 2025. Select a month to view Jeju sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:20 17:26
Tuesday, 16th December 2025 07:31 17:28
Wednesday, 31st December 2025 07:38 17:36

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