How hot is Seoul in January?

Daytime highs in Seoul in January average 3°C (37°F); nights drop to about -6°C.

Does it rain in Seoul in January?

Expect around 3.7 rainy days and 23 mm of rainfall in January.

Is January a good time to visit Seoul?

January is a challenging month to visit Seoul — consider April–May & October instead. Overall travel score: 1.8/10. The best months are April–May & October.

Seoul weather in January

January is a challenging month to visit Seoul — consider April–May & October instead. Expect highs around 3°C, lows near -6°C, and about 3.7 days with rain.

1.8 · Challengingtravel score for January

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Avg high

3°C

Avg low

-6°C

Rainfall

23 mm

Rain days

3.7

Sunshine

7.7 h/day

Daylight

9.7 h

What to pack for Seoul in January

serious winter gear: insulated coat, thermal layers

Humidity averages 60%; max daily wind around 16 km/h. Snow falls on about 1.2 days.

How January compares

Best months in Seoul: April–May & October. See the full best time to visit Seoul guide.

Seoul in January: the details

In January, Seoul sees average daytime highs of 3°C (37°F) and overnight lows of -6°C (20°F). Rainfall totals roughly 23 mm across 3.7 rainy days, and the sun shines about 7.7 hours per day with 9.7 hours of daylight mid-month. Relative humidity averages 60%.

These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Seoul, South Korea (37.57, 126.98) — see our methodology. Actual conditions vary year to year.

Where should you go next month?

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