Weather in Jeju in January 2026
- January is usually the coldest month of the year in Jeju;
Average weather
Average temperature in Jeju in January
The expected average maximum temperature in January is +48°F with a maximum of +68°F and a minimum of +25°F.
The average maximum temperature goes up 13% by the end of the month, compared with the beginning of the month, from +50°F to +55°F.
Is Jeju warm or cold in January?
Jeju is typically chill in January.
Maximum temperatures go down compared to the previous month from +50°F to +46°F. The minimum temperature also goes down from +43°F to +39°F.
Pack a jumper and a jacket as there will be cooler temperatures.
January is the coldest month in Jeju, here is the comparison with other months:
Climate in Jeju in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +50°F | +46°F | +48°F | ||||
| Min. temperature | ||||||
| +28°F | +21°F | +25°F | ||||
| Max. temperature | ||||||
| +70°F | +72°F | +73°F | ||||
| Rainfall | ||||||
| 59 mm | 66 mm | 68 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Humidity | ||||||
| 65% | 66% | 66% | ||||
| Air pressure | ||||||
| 1023 HPa | 1023 HPa | 1022 HPa | ||||
| Sunny days | ||||||
| 3 | 2 | 3 | ||||
| Cloudy days | ||||||
| 11 | 12 | 10 | ||||
| Rainy days | ||||||
| 15 | 13 | 13 | ||||
| Snowy days | ||||||
| 1 | 4 | 2 | ||||
January weather is still as ok as in December. It’s getting colder in January. From +50°F in the day, the average maximum temperature lowers to +46°F. Prepare for more rain. Average rainfall goes from 59 mm to 66 mm. Humidity rises from 65% to 66%. The average wind speed doesn’t change much during January, staying around 4 m/s. The days becoming less sunny, going from 3 sunny days in December to 2 in January.
February brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 9 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 decreasing during January, going from 4 m/s to 3 m/s over the course of the month.
Rain
Snow
January is one of the snowiest months in Jeju.
Here’s how January is compared with other months in the amount of snow, total mm:
How was the weather last January in Jeju?
Climate Change Over the Years
The climate in Jeju in January has not changed that much over the last 43 years.
The average temperature was the lowest in 1980 (+62°F) and the highest in 2024 (+67°F). The driest year was 2005 with only 752 mm of rainfall, and the wettest year was 1985 with 1808 mm.
FAQ
Is January a good time to visit Jeju?
Can you sunbathe in Jeju in January?
Is Jeju rainy in January?
Is it sunny in Jeju in January?
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.
