WanderWhen

Seoul weather in December

December is a challenging month to visit Seoul — consider April–May & October instead. Expect highs around 3°C, lows near -5°C, and about 4 days with rain.

2.0 · Challengingtravel score for December
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg high
3°C
Avg low
-5°C
Rainfall
22 mm
Rain days
4
Sunshine
7.2 h/day
Daylight
9.4 h

What to pack for Seoul in December

  • serious winter gear: insulated coat, thermal layers

Humidity averages 63%; max daily wind around 16 km/h. Snow falls on about 1 days.

How December compares

January: 1.8/10 JFebruary: 3.3/10 FMarch: 6.6/10 MApril: 9.8/10 AMay: 9.6/10 MJune: 8.9/10 JJuly: 5.2/10 JAugust: 5.1/10 ASeptember: 8.8/10 SOctober: 9.8/10 ONovember: 6.2/10 NDecember: 2.0/10 D

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

Seoul in December: the details

In December, Seoul sees average daytime highs of 3°C (37°F) and overnight lows of -5°C (22°F). Rainfall totals roughly 22 mm across 4 rainy days, and the sun shines about 7.2 hours per day with 9.4 hours of daylight mid-month. Relative humidity averages 63%.

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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