Jeju Island in January
In January, Jeju Island averages 8°C (46°F) during the day and 3°C (38°F) at night, with around 11 days of rain (90 mm total).
ShoulderConditions are cold — pack winter layers. Plan for unsettled weather and bring rain gear.
January in Jeju Island is outside the typical sweet spot for sightseeing weather. It can still be a great time to visit if you have specific reasons (festivals, off-season pricing, etc.).
How January compares to the rest of the year in Jeju Island
January is one of the coolest months in Jeju Island (12th of 12) and moderately rainy compared to the rest of the year (6th of 12). Daytime temperature runs 11°C below the annual average (18°C). January runs 2°C cooler than December (10°C) and warms a further 1°C into February (8°C).
January sunrise & sunset in Jeju Island
Times shown for Jeju Island local time (Asia/Seoul), calculated for the 15th of January. They shift by a few minutes day to day across the month.
Photography light in Jeju Island — January
Golden-hour and blue-hour windows for the 15th of January, in Jeju Island's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Jeju Island in January
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on January's tier (Shoulder) and Jeju Island's popularity.
Crowds & pricing — January in Jeju Island
Jeju Island is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — January in Jeju Island
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Jeju Island in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 8°C / 46°F | 3°C / 38°F | 90 mm | 11 | — |
| February | 8°C / 47°F | 4°C / 38°F | 73 mm | 10 | — |
| March | 13°C / 55°F | 7°C / 45°F | 112 mm | 10 | — |
| April | 17°C / 62°F | 11°C / 52°F | 130 mm | 10 | — |
| May | 21°C / 71°F | 16°C / 60°F | 147 mm | 10 | — |
| June | 24°C / 76°F | 20°C / 67°F | 206 mm | 14 | — |
| July | 28°C / 83°F | 24°C / 75°F | 253 mm | 18 | — |
| August | 29°C / 84°F | 25°C / 77°F | 269 mm | 18 | — |
| September | 25°C / 77°F | 22°C / 71°F | 359 mm | 17 | — |
| October | 20°C / 69°F | 16°C / 61°F | 152 mm | 10 | — |
| November | 15°C / 60°F | 11°C / 51°F | 88 mm | 11 | — |
| December | 10°C / 49°F | 5°C / 42°F | 85 mm | 14 | — |
Other cities with similar January weather
🌍 See the full ranked list of climate twins for Jeju Island in January →
Frequently asked questions
How hot is Jeju Island in January?
In January, Jeju Island averages a high of 8°C (46°F) and a low of 3°C (38°F) — generally cold.
Does it rain a lot in Jeju Island in January?
January can be fairly wet in Jeju Island, with about 11 rainy days on average.
Is January a good time to visit Jeju Island?
January is cold. It suits travelers who are comfortable with cold weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Jeju Island in January?
Pack heavy winter layers, a coat, hat and gloves, plus a compact umbrella or rain jacket. See the full January packing list for Jeju Island for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.