Jeju Weather in January
January in Jeju brings low temperatures around 9°C (48°F) during the day, dropping to 5°C (41°F) at night, with quite a bit of rainfall expected, averaging around 81 mm (3.2 in) for the month.
Rainfall in Jeju in January
Climate statistics over the past 30 years suggest around 13 days of rain, with 81 mm (3.2 in) average for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Jeju in January
January in Jeju brings low temperatures, with highs of 9°C (48°F) and nights around 5°C (41°F). January is part of the winter season. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. With moderate temperatures, January stands out as the chilliest month of the year.
Sunshine in Jeju in January
With limited sunshine this month, there are about 69 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Jeju. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Jeju's climate page.
Jeju Temperature in January
Min Temperature
5°C (41°F)
Max Temperature
9°C (48°F)
Chance of Rain
42%
Precipitation
81 mm (3.2 in)
Rainy days
13 days
Humidity
65%
Sunshine
69 hours
Percentage Sunshine
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Jeju typically stay consistent throughout January, with daily highs averaging around 9°C (48°F). Nights are cold, with lows around 3°C (37°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Jeju in January
Browse day-by-day weather records for Jeju spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jeju historical weather extremes in January
The extremes listed below come from historical weather data collected in Jeju from 1976 through 2025.
- The warmest day in January was on January 7, 2020, with a maximum of 23°C (73°F).
- The coldest January day was on January 25, 2018, with a maximum of -2°C (28°F).
- The coldest night in January in Jeju was on January 24, 2016, with a minimum of -6°C (21°F).
Best Places in South Korea in January
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in January →
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What to Wear in Jeju in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Jeju in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Jeju's climate page.
Temperature Rainfall Sunshine Humidity
See the full Jeju climate overview or explore weather in South Korea.
