Jeju weather in January 2026

Expect daytime maximum temperatures of 8°C in Jeju, South Korea in January based on long-term weather averages. There are 4 hours of sunshine per day on average with 12 days with some rainfall and typically 62 mm of rainfall in the month.

  • 8°C maximum daytime temperature in January in Jeju8
    8°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in January in Jeju12
    12 days with some rainfall
  • 1°C minimum night-time temperature in January in Jeju1
    1°C min night temperature
  • 10 hours of daylight per day in January in Jeju10
    10 hours of daylight per day
  • No heat & humidity in January in Jeju0
    No heat & humidity
  • 62 mm monthly rainfall in January in Jeju62
    62 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in Jeju3
    3 (Moderate) UV index
  • 15°C sea temperature in January in Jeju15
    15°C sea temperature

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The January 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 January?

Daytime temperatures usually reach 8°C in Jeju in January, falling to 1°C at night.

How sunny is it in Jeju in January?

There are normally 4 hours of bright sunshine each day in Jeju in January - that's 38% of daylight hours.

How warm is the sea around Jeju in January?

The average sea temperature around Jeju in January is 15°C.

Does it rain in Jeju in January?

There are usually 12 days with some rain in Jeju in January and the average monthly rainfall is 62mm.

Jeju January sunrise & sunset times

Browse the sunrise and sunset times for Jeju in January 2026. Select a month to view Jeju sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:38 17:37
Friday, 16th January 2026 07:38 17:49
Saturday, 31st January 2026 07:31 18:04

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