Monthly climate guide
Jeju weather in January
With highs near 8°C (47°F) and lows around 6°C (43°F), January feels cool in Jeju. Rainfall averages about 47 mm (fairly dry) and the sky is often cloudy. Daytime highs are 2°C cooler than December and about the same as February.
What stands out in January
- There's little difference between day and night (around 2°C).
- Just 190 km apart, but Jeju runs about 5°C warmer than Gwangju this month.
- In Jeju, January is mid-winter.
- Rain is well below Jeju's usual level (around 63% less).
January is typically Jeju's coolest month.It's usually the driest month of the year.
Avg high
8°C
47°F
Avg low
6°C
43°F
Rainfall
47 mm
fairly dry
Humidity
77%
relative
Sky
77%
cloud · often cloudy
Jeju weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 8°C / 47°F | 6°C / 43°F | 47 mm | 77% | 77% |
| February | 9°C / 48°F | 6°C / 43°F | 61 mm | 75% | 76% |
| March | 11°C / 52°F | 8°C / 47°F | 91 mm | 74% | 67% |
| April | 15°C / 58°F | 12°C / 53°F | 142 mm | 79% | 68% |
| May | 18°C / 64°F | 15°C / 60°F | 122 mm | 84% | 72% |
| June | 22°C / 71°F | 20°C / 67°F | 179 mm | 89% | 82% |
| July | 26°C / 78°F | 24°C / 75°F | 195 mm | 90% | 74% |
| August | 28°C / 82°F | 26°C / 79°F | 243 mm | 84% | 66% |
| September | 24°C / 76°F | 22°C / 72°F | 180 mm | 80% | 68% |
| October | 20°C / 69°F | 18°C / 64°F | 106 mm | 74% | 59% |
| November | 16°C / 60°F | 13°C / 56°F | 88 mm | 74% | 68% |
| December | 11°C / 51°F | 8°C / 46°F | 63 mm | 76% | 77% |
What to pack for January
- A proper insulated winter coat
- A hat, scarf and gloves
- A small travel umbrella, just in case
Is January a good time to visit Jeju?
Compare the months in the chart above to find your ideal window.
Best time to visit Jeju →Other South Korea cities in January
Cite or embed this data
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Jeju weather in January. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/south-korea/jeju/january
<a href="https://weathercompare.eu/weather/south-korea/jeju/january">Jeju weather in January</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/south-korea/jeju" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Jeju weather in January"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/south-korea/jeju/january">Jeju weather in January</a> – WeatherCompare</p>
Jeju in January: quick answers
Is January a good time to visit Jeju?
January is cool in Jeju, with highs around 8°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Jeju in January?
Average highs are about 8°C (47°F) and average lows about 6°C (43°F), based on 10 years of daily data.
Does it rain a lot in Jeju in January?
Jeju typically gets around 47 mm of rain in January — fairly dry. It's usually the driest month of the year.
Figures are long-term averages for the area around Jeju (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.