Temperatures in January
It's cold in January in Jeju with an average temperature of 9°C. Temperatures this month range from a low of 8°C to a high of 11°C. At night, you can expect temperatures between 3°C and 5°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Jeju in January. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of January
The month of January starts in Jeju with cold temperatures, averaging around 10°C during the day and nights close to 5°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-January
By mid-January, the average daytime temperature drops to around 9°C, with nights close to 5°C. There might be a few showers during this period, but plenty of dry days with sunshine too. Wear a thick coat, jumper, and long trousers.
End of January
By the end of January, the average daytime temperature in Jeju will be around 10°C, with nights close to 5°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
Water temperature
The water temperature at Jeju is 15°C this month. This is probably too cold to swim without protective gear.
Precipitation in January
In January, there is an average of 74 mm of precipitation, spread over 8 days. Of the total precipitation, about 6,8 cm falls as snow in January. The wind speed is around 4 Bft, mostly coming from the Southwest.
The average precipitation chance is 27% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in January for Jeju. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Jeju in January |
London | ||
|---|---|---|---|
 Average Temperature |
9°C | 8°C | |
 High Temp |
11°C | 9°C | |
| Low Temp |
8°C | 6°C | |
 Total Precipitation |
74 mm | 58 mm | |
| Rainy Days |
8 days | 9 days | |
 Total Snowfall |
6,8 cm | 0,8 cm | |
| Snowy Days |
3 days | 1 day | |
December
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Temperature records for Jeju in January
With 23°C, Jeju hit the highest temperature in the last 10 years in January 2020. The lowest daytime temperature in this month was -2°C in 2018. The extreme night temperatures ranged from a low of -6°C to a high of 15°C.
Check out the climate of Jeju for all months and discover the best travel time
Curious about the climate in other parts of South Korea? Check out the weather and climate in places like Seoul, Busan, or have a look at other destinations in South Korea.
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Daily Temperature in January in Jeju
This chart shows the average daily temperatures, both day and night, for each day in January in Jeju, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in January in Jeju
The chart below shows the average daily precipitation in January for Jeju, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for January, you can expect around 8 days of rain in Jeju.
Daily Snowfall in January in Jeju
This chart shows the average daily snowfall in January in Jeju, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in January.
Daily UV Index in January in Jeju
This chart shows the average daily UV index in January in Jeju, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in January in Jeju Over the Years
This chart shows the average temperature in January in Jeju, measured in degrees Celsius, over the past years.
Total Precipitation in January in Jeju Over the Years
This chart shows the average precipitation in January in Jeju, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in January in Jeju per year
This chart shows the average snowfall in January in Jeju, measured in centimetres, over the past years.
Daily climate in January for Jeju
Click on a specific day in January for detailed info on the typical weather on that day in Jeju. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Jeju
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Average Weather in Jeju by Month
Click on a month below to see detailed weather info for Jeju. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
