Weather in Jeju in December 2025
- December is usually the driest month of the year in Jeju
Average weather
Average temperature in Jeju in December
Going from a maximum of +19°C during the day to a minimum of 0°C during the night, the temperature in December averages around +11°C.
The average maximum temperature goes up 11% by the end of the month, compared with the beginning of the month, from +8°C to +10°C.
Is Jeju warm or cold in December?
Jeju is typically cool in December.
Maximum temperatures go down compared to the previous month from +15°C to +10°C. The minimum temperature also goes down from +11°C to +6°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Jeju, here is the comparison with other months:
Climate in Jeju in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +15°C | +10°C | +8°C | ||||
| Min. temperature | ||||||
| +2°C | -2°C | -6°C | ||||
| Max. temperature | ||||||
| +25°C | +21°C | +22°C | ||||
| Rainfall | ||||||
| 78 mm | 59 mm | 66 mm | ||||
| Wind | ||||||
| 3 m/s | 4 m/s | 4 m/s | ||||
| Humidity | ||||||
| 67% | 65% | 66% | ||||
| Air pressure | ||||||
| 1021 HPa | 1023 HPa | 1023 HPa | ||||
| Sunny days | ||||||
| 5 | 3 | 2 | ||||
| Cloudy days | ||||||
| 10 | 11 | 12 | ||||
| Rainy days | ||||||
| 15 | 15 | 13 | ||||
| Snowy days | ||||||
| 0 | 1 | 4 | ||||
December weather is still as ok as in November. It’s getting colder in December. From +15°C in the day, the average maximum temperature lowers to +10°C. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 78 mm to 59 mm. It feels drier, as humidity decreases from 67% to 65%. Winds are stronger in comparison to November, going up from 3 m/s to 4 m/s on average. The days becoming less sunny, going from 5 sunny days in November to 3 in December.
January brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Jeju is gradually increasing during December, going from 5 m/s to 5 m/s over the course of the month.
Rain
Snow
December is one of the snowiest months in Jeju.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Jeju?
Climate Change over Years
The climate in Jeju in December has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2024 (+19°C). The driest year was 2005 with only 752 mm of rainfall, and the wettest year was 1985 with 1808 mm.
FAQ
Is December a good time to visit Jeju?
Can you sunbathe in Jeju in December?
Is Jeju rainy in December?
Is it sunny in Jeju in December?
Other cities in South Korea
Monthly weather in Jeju
Source of the data
For this page, we’ve looked at the typical weather in Jeju, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
