Jeju weather in January 2027

Q: How cold is it in Jeju in January?

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

Q: How sunny is it in Jeju in January?

There are normally 6 hours of bright sunshine each day in Jeju in January - that's 56% of daylight hours.

Q: Does it rain in Jeju in January?

There are usually 7 days with some rain in Jeju in January and the average monthly rainfall is 22mm. Rain may fall as snow in this month.

Expect daytime maximum temperatures of 46°F 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 2.4 inches of rainfall in the month.

46
46°F max day temperature
4
4 hours of sunshine per day
12
12 days with some rainfall
34
34°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
2.4
2.4 inches of monthly rainfall
3
3 (Moderate) UV index
59
59°F 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) | Imperial (°F)

How cold is it in Jeju in January?

Daytime temperatures usually reach 34°F in Jeju in January, falling to 18°F at night.

How sunny is it in Jeju in January?

There are normally 6 hours of bright sunshine each day in Jeju in January - that's 56% of daylight hours.

Does it rain in Jeju in January?

There are usually 7 days with some rain in Jeju in January and the average monthly rainfall is 0.9 inches. Rain may fall as snow in this month.